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Dzyaloshinskii–Moriya interaction and field-free sub-10 nm topological magnetism in Fe/bismuth oxychalcogenides heterostructures
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作者 Yaoyuan Wang Long You +1 位作者 Kai Chang Hongxin Yang 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第9期200-206,共7页
Topological magnetism with strong robustness,nanoscale dimensions and ultralow driving current density(106 A/m^(2))is promising for applications in information sensing,storage,and processing,and thus sparking widespre... Topological magnetism with strong robustness,nanoscale dimensions and ultralow driving current density(106 A/m^(2))is promising for applications in information sensing,storage,and processing,and thus sparking widespread research interest.Exploring candidate material systems with nanoscale size and easily tunable properties is a key for realizing practical topological magnetism-based spintronic devices.Here,we propose a class of ultrathin heterostructures,Fe/Bi_(2)O_(2)X(X=S,Se,Te)by deposing metal Fe on quasi-two-dimensional(2D)bismuth oxychalcogenides Bi_(2)O_(2)X(X=S,Se,Te)with excellent ferroelectric/ferroelastic properties.Large Dzyaloshinskii–Moriya interaction(DMI)and topological magnetism can be realized.Our atomistic spin dynamics simulations demonstrate that field-free vortex–antivortex loops and sub-10 nm skyrmions exist in Fe/Bi_(2)O_(2)S and Fe/Bi_(2)O_(2)Se interfaces,respectively.These results provide a possible strategy to tailor topological magnetism in ultrathin magnets/2D materials interfaces,which is extremely vital for spintronics applications. 展开更多
关键词 dzyaloshinskii–moriya interaction field-free TOPOLOGICAL MAGNETISM
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Pairwise thermal entanglement in a three-qubit Heisenberg XX model with a nonuniform magnetic field and Dzyaloshinski-Moriya interaction 被引量:3
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作者 任金忠 邵晓强 +1 位作者 张寿 Yeon Kyu-Hwang 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第10期74-80,共7页
Pairwise thermal entanglement in a three-qubit Heisenberg XX model is investigated when a nonuniform mag- netic field and the Dzyaloshinski-Moriya interaction are included. We find that the nonuniform magnetic field a... Pairwise thermal entanglement in a three-qubit Heisenberg XX model is investigated when a nonuniform mag- netic field and the Dzyaloshinski-Moriya interaction are included. We find that the nonuniform magnetic field and Dzyaloshinski-Moriya interaction are the more efficient control parameters for the increase of entanglement and critical temperature. For both the nearest neighbour sites and the next nearest neighbour sites, the magnetic field can induce entanglement to a certain extent and the Dzyaloshinski-Moriya interaction can enhance the entanglement to a stable value. The steady value of the nearest neighbour site entanglement C12 is larger than the next nearest neighbour site entanglement C13. An interesting phenomenon is that the entanglement curve of C12 appears a peak value when the Dzyaloshinski-Moriya interaction is considered in a nonuniform magnetic field. 展开更多
关键词 thermal entanglement nonuniform magnetic field dzyaloshinski-moriya interaction Heisenberg model
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Thermal quantum discord in Heisenberg models with Dzyaloshinski-Moriya interaction 被引量:2
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作者 王林成 闫俊彦 衣学喜 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第4期53-58,共6页
We study the quantum discord of the bipartite Heisenberg model with the Dzyaloshinski-Moriya (DM) interaction in thermal equilibrium state and discuss the effect of the DM interaction on the quantum discord. The qua... We study the quantum discord of the bipartite Heisenberg model with the Dzyaloshinski-Moriya (DM) interaction in thermal equilibrium state and discuss the effect of the DM interaction on the quantum discord. The quantum entanglement of the system is also discussed and compared with quantum discord. Our results show that the quantum discord may reveal more properties of the system than quantum entanglement and the DM interaction may play an important role in the Heisenberg model. 展开更多
关键词 quantum discord thermal equilibrium state Heisenberg model dzyaloshinski-moriya interaction
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Thermal entanglement of the Ising Heisenberg diamond chain with Dzyaloshinskii Moriya interaction 被引量:1
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作者 谯洁 周斌 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第11期110-117,共8页
We investigate the thermal entanglement in a spin-l/2 Ising-Heisenberg diamond chain, in which the vertical Heisen- berg spin dimers alternate with single Ising spins. Due to the fact that the Dzyaloshinskii-Moriya ... We investigate the thermal entanglement in a spin-l/2 Ising-Heisenberg diamond chain, in which the vertical Heisen- berg spin dimers alternate with single Ising spins. Due to the fact that the Dzyaloshinskii-Moriya (DM) interaction con- tributes to unusual and interesting magnetic properties in actual materials, and moreover it plays a significant role in the degree of the entanglement of the Heisenberg quantum spin systems, we focus on the effects of different DM interactions, including Dz and Dx, on the thermal entanglement of the Heisenberg spin dimer. The concurrence, as a measure of spin dimer entanglement, is calculated for different values of exchange interactions, DM interaction, external magnetic field, and temperature. It is found that the critical temperature and the critical magnetic field corresponding to the vanishing of entanglement increase with DM interaction, and the entanglement revival region gets larger by increasing DM interac- tion, thus DM interaction favors the formation of the thermal entanglement. It is observed that different DM interaction parameters (Dz and Dx) have remarkably different influences on the entanglement. Different from the case Dz, there is the non-monotonic variation of the concurrence with temperature in the case Dx, and additionally the DM interaction Dx can induce the entanglement near zero temperature in the case that the antiferromagnetic Ising-type interaction constant is larger than the antiferromagnetic Heisenberg interaction constant. It is also shown that for the same value of DM interaction the critical magnetic field of the case Dx is larger than that of the case Dz. 展开更多
关键词 thermal entanglement Ising-Heisenberg diamond chain dzyaloshinskii-moriya interaction
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Quantum Discord of a Two-Qubit Anisotropy XXZ Heisenberg Chain with Dzyaloshinskii-Moriya Interaction 被引量:1
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作者 Nour Zidan 《Journal of Quantum Information Science》 2014年第2期104-110,共7页
We investigate the quantum discord of a two-qubit anisotropy XXZ Heisenberg chain with Dzyaloshinskii-Moriya (DM) interaction under magnetic field. It is shown that the quantum discord highly depends on the system’s ... We investigate the quantum discord of a two-qubit anisotropy XXZ Heisenberg chain with Dzyaloshinskii-Moriya (DM) interaction under magnetic field. It is shown that the quantum discord highly depends on the system’s temperature T, DM interaction D, homogenous magnetic field B and the anisotropy Δ. For lower temperature T, by modulating D and B, the quantum discord can be controlled and the quantum discord switch can be realized. 展开更多
关键词 Quantum DISCORD HEISENBERG Chain dzyaloshinskii-moriya interaction ANISOTROPY Magnetic Field
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Quantum steering in Heisenberg models with Dzyaloshinskii–Moriya interactions
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作者 Hui-Zhen Li Rong-Sheng Han +1 位作者 Ye-Qi Zhang Liang Chen 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第12期189-195,共7页
In this work, we study the quantum steering in two-qubit Heisenberg models with Dzyaloshinskii–Moriya(DM)interaction and an external magnetic field. We find that the steerable weight(SW) and the critical temperature ... In this work, we study the quantum steering in two-qubit Heisenberg models with Dzyaloshinskii–Moriya(DM)interaction and an external magnetic field. We find that the steerable weight(SW) and the critical temperature where SW → 0 can be enhanced by the DM interactions. In the special case where the magnetic field is vanishing and the two spins are ferromagnetically coupled, the DM interaction can tune the zero-temperature SW from zero to a finite value. In addition to the SW, some other measurements used to identify the quantum entanglement and quantum correlations are investigated, i.e., the concurrence, the quantum discord, and the robustness of coherence. In the strong magnetic field limit,our results show that the SW is dramatically different from the other measurements. 展开更多
关键词 quantum steering Heisenberg model dzyaloshinskii–moriya interaction
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Magnetization reversal within Dzyaloshinskii Moriya interaction under on-site Coulomb interaction in BiCrO_3
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作者 冯宏剑 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第8期409-415,共7页
First-principals calculations show that magnetization reversal is accompanied by the opposite sense of rotation of the neighboring oxygen octahedra along the [1 1 1] direction which is called the antiferrodistortive d... First-principals calculations show that magnetization reversal is accompanied by the opposite sense of rotation of the neighboring oxygen octahedra along the [1 1 1] direction which is called the antiferrodistortive displacement in BiCrO3. The coupling between magnetization and antiferrodistortive distortion is mainly caused by Dzyaloshinskii- Moriya interaction which is driven by the eg-eg states antiferromagnetic interaction in Cr-3d. A critical value of on-site Coulomb interaction prohibiting the Dzyaloshinskii-Moriya interaction and thus the magnetization reversal is found to be 1.3 eV. 展开更多
关键词 dzyaloshinskii moriya interaction density of states BiCrO3
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Geometric phases and quantum phase transitions in inhomogeneous XY spin-chains:Effect of the Dzyaloshinski-Moriya interaction
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作者 王林成 闫俊彦 衣学喜 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第4期152-158,共7页
We study geometric phases of the ground states of inhomogeneous XY spin chains in transverse fields with Dzyaloshinski--Moriya (DM) interaction, and investigate the effect of the DM interaction on the quantum phase ... We study geometric phases of the ground states of inhomogeneous XY spin chains in transverse fields with Dzyaloshinski--Moriya (DM) interaction, and investigate the effect of the DM interaction on the quantum phase transition (QPT) of such spin chains. The results show that the DM interaction could influence the distribution of the regions of QPTs but could not produce new critical points for the spin-chain. This study extends the relation between geometric phases and QPTs. 展开更多
关键词 geometric phase quantum phase transition the dzyaloshinski-moriya interaction
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Exact soliton solutions in anisotropic ferromagnetic wires with Dzyaloshinskii–Moriya interaction
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作者 Qiu-Yan Li Dun-Zhao Zai-Dong Li 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第1期502-504,共3页
We theoretically investigate the exact soliton solutions of anisotropic ferromagnetic wires with Dzyaloshinskii–Moriya interaction. For example, we give the bright and black soliton solutions. From these results we f... We theoretically investigate the exact soliton solutions of anisotropic ferromagnetic wires with Dzyaloshinskii–Moriya interaction. For example, we give the bright and black soliton solutions. From these results we find that the Dzyaloshinskii–Moriya interaction affects the existence region of soliton, spin-wave transport, and soliton dynamic properties. As the Dzyaloshinskii–Moriya interaction grows, the soliton width is widened, which provides a way to control the soliton dynamics. 展开更多
关键词 bright soliton black soliton dzyaloshinskii–moriya interaction
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Scaling of entanglement entropy for spin chain with Dzyaloshinskii-Moriya interaction
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作者 杜龙 侯净敏 +3 位作者 丁伽焱 张文新 田志 陈婷婷 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第2期48-53,共6页
This paper investigates the entanglement in an XX-type spin chain with Dzyaloshinskii--Moriya interaction under an external magnetic field. The von Neumann entropy of entanglement between two blocks for the ground sta... This paper investigates the entanglement in an XX-type spin chain with Dzyaloshinskii--Moriya interaction under an external magnetic field. The von Neumann entropy of entanglement between two blocks for the ground state of the system is evaluated. It analyses and discusses the scaling behaviour of the entanglement entropy. 展开更多
关键词 ENTANGLEMENT SCALING spin chain dzyaloshinskii-moriya interaction
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Influence of Dzyaloshinskii-Moriya and Kaplan-Shekhtman-Entinwohlman-Aharony superexchange interactions on ground state properties of the one-dimensional spin-Peilers model in open chain
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作者 刘海莲 黄仙山 +1 位作者 王治国 石云龙 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第11期637-640,共4页
The effects of the Dzyaloshinskii Moriya (DM) and the Kaplan-Shekhtman-Entinwohlman-Aharony (KSEA) superexchange interactions on the ground state properties of the one-dimensional spin-Peilers system in open chain... The effects of the Dzyaloshinskii Moriya (DM) and the Kaplan-Shekhtman-Entinwohlman-Aharony (KSEA) superexchange interactions on the ground state properties of the one-dimensional spin-Peilers system in open chain are studied by using the Lanczos numerical method. The study concentrates mainly on the influence of systemic dimerisation in open chain. The results show that systemic ground state energy density varies with dimerisation parameter 5 in different DM interactions, and there exists a special point 5c where the DM interaction has no influence on the systemic dimerisation, no matter whether the DM interaction is relative or irrelative to systemic dimerisation (η= 1 or η=0). The KSEA interaction has no fixed special point, but the points of intersection are dense relatively in a certain numberical value range, and sparse in other numberical value ranges. So we can conclude that the antisymmetric anisotropy DM interaction differs from the symmetric anisotropy KSEA interaction, but they are analogous in the sense of the influence of systemic dimerisation in open chain. 展开更多
关键词 DIMERISATION dzyaloshinskii-moriya interaction Kaplan-Shekhtman-Entinwohlman Aharony interaction open chain
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Entanglement evolution in an anisotropic two-qubit Heisenberg XYZ model with Dzyaloshinskii-Moriya interaction
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作者 陈涛 黄燕霞 +3 位作者 单传家 李金星 刘继兵 刘堂昆 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第5期35-40,共6页
This paper investigates the entanglement evolution of a two-qubit anisotropic Heisenberg XYZ chain in the presence of Dzyaloshinskii-Moriya interaction. The time evolution of the concurrence is studied for the initial... This paper investigates the entanglement evolution of a two-qubit anisotropic Heisenberg XYZ chain in the presence of Dzyaloshinskii-Moriya interaction. The time evolution of the concurrence is studied for the initial pure entangled states cosθ|00〉 + sinθ |11〉 and cos Ф |01〉 + sin Ф10〉 at zero temperature. The influences of Dzyaloshinskii Moriya interaction D, anisotropic parameter △ and environment coupling strength γ on entanglement evolution are analysed in detail. It is found that the effect of noisy environment obviously suppresses the entanglement evolution, and the Dzyaloshinskii-Moriya interaction D acts on the time evolution of entanglement only when the initial state is cos Ф |01〉 sinФ|10〉. Finally, a formula of steady state concurrence is obtained, and it is shown that the stable concurrence, which is independent of different initial states and Dzyaloshinskii-Moriya interaction D, depends on the anisotropic parameter △ and the environment coupling strength. 展开更多
关键词 Heisenberg model entanglement evolution DECOHERENCE dzyaloshinskii-moriya interaction
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Thermal entanglement in a two-qubit Heisenberg XY chain with the Dzyaloshinskii-Moriya interaction
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作者 秦猛 徐胜龙 +1 位作者 陶应娟 田东平 《Chinese Physics B》 SCIE EI CAS CSCD 2008年第8期2800-2803,共4页
This paper investigates thermal entanglements of a two-qubit Heisenberg XY chain in the presence of the Dzyaloshinskii-Moriya anisotropic antisymmetric interaction. By the concept of concurrence, it is found that the ... This paper investigates thermal entanglements of a two-qubit Heisenberg XY chain in the presence of the Dzyaloshinskii-Moriya anisotropic antisymmetric interaction. By the concept of concurrence, it is found that the effects of spin-orbit coupling on the entanglement are different from those of spin-spin model. The analytical expressions of concurrence are obtained for this model. 展开更多
关键词 thermal entanglement Heisenberg XY chain dzyaloshinskii-moriya interaction
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The dynamics of one-dimensional random quantum XY system with Dzyaloshinskii-Moriya interaction
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作者 李银芳 孔祥木 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第3期481-486,共6页
In this paper,the effects of random variables on the dynamics of the s = 1/2 XY model with the Dzyaloshinskii-Moriya interaction are studied.By means of the recurrence relation method in the high-temperature limit,we ... In this paper,the effects of random variables on the dynamics of the s = 1/2 XY model with the Dzyaloshinskii-Moriya interaction are studied.By means of the recurrence relation method in the high-temperature limit,we calculate the spin autocorrelation functions as well as the corresponding spectral densities for the cases that the exchange couplings between spins or external magnetic fields satisfy the double-Gaussian distribution.It is found that when the standard deviation of random exchange coupling δJ(or the standard deviation of random external field δB) is small,the dynamics of the system undergoes a crossover from a collective-mode behavior to a central-peak one.However,when δJ(or δB) is large,the crossover vanishes,and the system shows a central-peak behavior or the most disordered one.We also analyze the cases in which the exchange couplings or the external fields satisfy the bimodal and the Gaussian distributions.Our results show that for all the cases considered,the dynamics of the above system is similar to that of the one-dimensional random XY model. 展开更多
关键词 correlation function spectral density dzyaloshinskii-moriya interaction recurrence relation method
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The effects of the Dzyaloshinskii-Moriya interaction on the ground-state properties of the XY chain in a transverse field
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作者 钟鸣 徐卉 +1 位作者 刘小贤 童培庆 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第9期285-291,共7页
The effects of the Dzyaloshinski-Moriya (DM) interaction on the ground-state properties of the anisotropic XY chain in a transverse field have been studied by means of correlation functions and entanglement. Differe... The effects of the Dzyaloshinski-Moriya (DM) interaction on the ground-state properties of the anisotropic XY chain in a transverse field have been studied by means of correlation functions and entanglement. Different from the case without the DM interaction, the excitation spectra ek of this model are not symmetrical in the momentum space and are not always positive. As a result, besides the ferromagnetic (FM) and the paramagnetic (PM) phases, a gapless chiral phase is induced. In the chiral phase, the von Neumann entropy is proportional to log2 L (L is the length of a subchain) with the coefficient A ~ 1/3, which is the same as that of the XY chain in a transverse field without the DM interaction for 7 = 0 and 0 〈 h 〈 1. And in the vicinity of the critical point between the chiral phase and the FM (or PM) phase, the behaviors of the nearest- neighbor concurrence and its derivative are like those for the anisotropy transition. 展开更多
关键词 dzyaloshinskii-moriya interaction the XY chain in a transverse field quantum entanglement ground-state properties
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Correlation dynamics of a qubit qutrit system in a spin-chain environment with Dzyaloshinsky Moriya interaction
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作者 杨阳 王安民 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第2期99-105,共7页
We study the dynamics of correlations for a hybrid qubit-qutrit system in an XY spin-chain environment with Dzyaloshinsky-Moriya interaction. Our discussion involves a comparative analysis of negativity, quantum disco... We study the dynamics of correlations for a hybrid qubit-qutrit system in an XY spin-chain environment with Dzyaloshinsky-Moriya interaction. Our discussion involves a comparative analysis of negativity, quantum discord, and measurement-induced disturbance. It is found that the quantum discord is optimal of the three quantum correlations to de- tect the critical point of quantum phase transition. Only when the qubit interacts with the environment, is the phenomenon of sudden transition between the classical correlation and the quantum discord observed. Moreover, the Dzyaloshinsky- Moriya interaction enhances the decay of quantum correlations. 展开更多
关键词 quantum correlation quantum discord measurement-induced disturbance Dzyaloshinsky- moriya interaction
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Improving quantum state transfer in a general XY chain via the Dzyaloshinsky Moriya interaction
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作者 张剑 绍彬 +1 位作者 邹健 李前树 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第10期51-60,共10页
We study the state transfer of Bell states in a general XY spin chain using the Dzyaloshinsk^Moriya interaction. Two symmetries of fidelity with the anisotropy parameter axe found. The maximum fidelity is shown to be ... We study the state transfer of Bell states in a general XY spin chain using the Dzyaloshinsk^Moriya interaction. Two symmetries of fidelity with the anisotropy parameter axe found. The maximum fidelity is shown to be significantly enhanced in cases of an odd number of sites. Enhancement of fidelity on a singlet state is greater than that on the other Bell states in such cases. 展开更多
关键词 state transfer XY spin chain Dzyaloshinsky-moriya interaction
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Induced modification of the geometric phase of a qubit coupled to an XY spin chain by Dzyaloshinsky-Moriya interaction
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作者 张爱萍 李福利 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第3期152-157,共6页
We consider a qubit symmetrically and transversely coupled to an XY spin chain with Dzyaloshinsky-Moriya(DM) interaction in the presence of a transverse magnetic field.An analytical expression for the geometric phas... We consider a qubit symmetrically and transversely coupled to an XY spin chain with Dzyaloshinsky-Moriya(DM) interaction in the presence of a transverse magnetic field.An analytical expression for the geometric phase of the qubit is obtained in the weak coupling limit.We find that the modification of the geometrical phase induced by the spin chain environment is greatly enhanced by DM interaction in the weak coupling limit around the quantum phase transition point of the spin chain. 展开更多
关键词 geometric phase quantum phase transition XY spin chain Dzyaloshinsky-moriya interaction
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Entanglement sudden death induced by the Dzialoshinskii-Moriya interaction
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作者 曾红芳 邵彬 +2 位作者 杨林广 李建 邹健 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第8期3265-3270,共6页
In this paper, we study the entanglement dynamics of two-spin Heisenberg XYZ model with the Dzialoshinskii- Moriya (DM) interaction. The system is initially prepared in the Werner state. The effects of purity of the... In this paper, we study the entanglement dynamics of two-spin Heisenberg XYZ model with the Dzialoshinskii- Moriya (DM) interaction. The system is initially prepared in the Werner state. The effects of purity of the initial state and DM coupling parameter on the evolution of entanglement are investigated. The necessary and sufficient condition for the appearance of the entanglement sudden death (ESD) phenomenon has been deduced. The result shows that the ESD always occurs if the initial state is sufficiently impure for the given coupling parameter or the DM interaction is sufficiently strong for the given initial state. Moreover, the critical values of them are calculated. 展开更多
关键词 entanglement sudden death CONCURRENCE PURITY Dzialoshinskii-moriya interaction
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Measurement-induced disturbance in Heisenberg XY spin model with Dzialoshinskii-Moriya interaction under intrinsic decoherence
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作者 沈诚诰 张国锋 +1 位作者 樊开明 朱汉杰 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第5期102-106,共5页
Quantum correlations measured by measurement-induced disturbance (MID) in a two-qubit Heisenberg XY spin model with Dzialoshinskii-Moriya (DM) interaction under intrinsic decoherence are investigated. MID is studi... Quantum correlations measured by measurement-induced disturbance (MID) in a two-qubit Heisenberg XY spin model with Dzialoshinskii-Moriya (DM) interaction under intrinsic decoherence are investigated. MID is studied un-der various circumstances and the influences of the external dependencies on the final quantum state which has stable MID are discussed. Two kinds of initial quantum states are considered as well as different conclusions. MID appears to decay periodically during the processing of intrinsic decoherence; both DM interaction and intrinsic decoherence have a negative impact on the correlations. The MID of the stable state depends on several factors, except the parameter of the intrinsic decoherence. Moreover, we find a special initial state that is able to maintain the maximum quantum correlations during the processing of intrinsic decoherence. 展开更多
关键词 intrinsic decoherence measurement-induced disturbance quantum correlations dzialoshinskii-moriya interaction
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