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基于原子/分子团簇结构的材料与器件制造
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作者 邵金友 宋凤麒 +8 位作者 李祥明 杨扬 谭新峰 詹东平 金明尚 孙頔 付德君 谭元植 许辉 《中国科学基金》 CSCD 北大核心 2024年第1期115-131,共17页
原子/分子团簇是物质结构的一种新形态,具有独特的本征性质。从原子/分子团簇到器件的跨尺度制造,将为国防高端装备和新兴电子等产业发展带来深刻变革。团簇的多物质构效关系、宏量制造、团簇结构跨尺度构筑以及团簇器件的高性能制造等... 原子/分子团簇是物质结构的一种新形态,具有独特的本征性质。从原子/分子团簇到器件的跨尺度制造,将为国防高端装备和新兴电子等产业发展带来深刻变革。团簇的多物质构效关系、宏量制造、团簇结构跨尺度构筑以及团簇器件的高性能制造等是原子/分子团簇器件制造的关键发展方向,主导着从原子到产品制造的发展历程。把握这些发展背后的重要机遇,将有助于占领原子级制造研究的制高点,引领原子级制造方法的变革。本文从团簇新材料的宏量制造、新型功能器件的原子/分子团簇构筑、团簇—器件的跨尺度制造工艺和装备等三个方面概括了原子/分子团簇与器件制造领域的主要研究进展,总结了原子/分子团簇与器件领域的关键科学问题及面临的挑战,并对其未来发展方向和发展战略给出了建议。 展开更多
关键词 原子/分子团簇 功能器件 定域组装 异质/异构界面 构效关系 宏量制造
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原子制造的物质科学基础
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作者 戴庆 宋凤麒 +13 位作者 潘曹峰 刘开辉 姚广保 郑浩 谭元植 潘金波 杜灵杰 黄璞 王曾晖 陈辉 张晨栋 费付聪 徐红星 戴亚飞 《科学通报》 EI CAS CSCD 北大核心 2024年第19期2777-2788,共12页
近年来,原子制造技术备受关注,已成为各国积极追求的前沿制造技术领域.一代物质科学,一代制造革新,原子制造技术的发展不仅仰赖于深厚的物质科学底蕴,还需要解决高效的原子精准操控与测量、原子尺度结构的物性设计等多个方面的基础科学... 近年来,原子制造技术备受关注,已成为各国积极追求的前沿制造技术领域.一代物质科学,一代制造革新,原子制造技术的发展不仅仰赖于深厚的物质科学底蕴,还需要解决高效的原子精准操控与测量、原子尺度结构的物性设计等多个方面的基础科学问题.2023年3月,国家自然科学基金委员会交叉科学部在武汉召开了主题为“原子制造的物质科学基础”的战略研讨会.本文基于会议研讨的相关内容,对原子制造技术的发展背景、概念内涵以及面临的挑战进行了凝练,并提出如何利用该技术推动物质科学的快速发展,同时也就国家自然科学基金委员会对该领域的顶层设计和战略规划提出了政策建议. 展开更多
关键词 原子制造 物质科学 原子操控 原子级制造 单原子器件 物质创制
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Electrical spin polarization through spin-momentum locking in topological-insulator nanostructures
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作者 Minhao Zhang Xuefeng Wang +1 位作者 fengqi song Rong Zhang 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第9期15-25,共11页
Recently, spin-momentum-locked topological surface states(SSs) have attracted significant attention in spintronics.Owing to spin-momentum locking, the direction of the spin is locked at right angles with respect to ... Recently, spin-momentum-locked topological surface states(SSs) have attracted significant attention in spintronics.Owing to spin-momentum locking, the direction of the spin is locked at right angles with respect to the carrier momentum.In this paper, we briefly review the exotic transport properties induced by topological SSs in topological-insulator(TI)nanostructures, which have larger surface-to-volume ratios than those of bulk TI materials. We discuss the electrical spin generation in TIs and its effect on the transport properties. A current flow can generate a pure in-plane spin polarization on the surface, leading to a current-direction-dependent magnetoresistance in spin valve devices based on TI nanostructures.A relative momentum shift of two coupled topological SSs also generates net spin polarization and induces an in-plane anisotropic negative magnetoresistance. Therefore, the spin-momentum locking can enable the broad tuning of the spin transport properties of topological devices for spintronic applications. 展开更多
关键词 spin-momentum locking electrical spin generation topological insulators topological devices SPINTRONICS
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Tunable magnetism and band structure in kagome materials RETi3Bi4 family with weak interlayer interactions
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作者 Jingwen Guo Liqin Zhou +19 位作者 Jianyang Ding Gexing Qu Zhengtai Liu Yu Du Heng Zhang Jiajun Li Yiying Zhang Fuwei Zhou Wuyi Qi Minghui Cui Yongxin Zhang Fengyi Guo Tianqi Wang Fucong Fei Yaobo Huang Tian Qian Dawei Shen You song Hongming Weng fengqi song 《Science Bulletin》 SCIE EI CAS CSCD 2024年第17期2660-2664,共5页
Kagome lattice,characterized by two-dimensional honeycomb network of corner-sharing triangles[1],presents flat bands,Dirac cones,and van Hove singularities(VHSs),which have been theoretically predicted and experimenta... Kagome lattice,characterized by two-dimensional honeycomb network of corner-sharing triangles[1],presents flat bands,Dirac cones,and van Hove singularities(VHSs),which have been theoretically predicted and experimentally observed[2-4].When combined with spin-orbit coupling(SOC)and magnetism,novel properties have emerged.Although kagome materials vary,most of their strong interlayer interactions make the synthesized crystals not layered,and the properties deviating from the raw two-dimensional kagome lattices.These crystals are difficult to fabricate into thin devices and to tune the physical properties of the materials using gate voltage. 展开更多
关键词 network INTERLAYER structure
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Tunable optical topological transitions of plasmon polaritons in WTe_(2) van der Waals films
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作者 Yuangang Xie Chong Wang +9 位作者 Fucong Fei Yuqi Li Qiaoxia Xing Shenyang Huang Yuchen Lei Jiasheng Zhang Lei Mu Yaomin Dai fengqi song Hugen Yan 《Light(Science & Applications)》 SCIE EI CSCD 2023年第9期1807-1817,共11页
Naturally existing in-plane hyperbolic polaritons and the associated optical topological transitions,which avoid the nano-structuring to achieve hyperbolicity,can outperform their counterparts in artificial metasurfac... Naturally existing in-plane hyperbolic polaritons and the associated optical topological transitions,which avoid the nano-structuring to achieve hyperbolicity,can outperform their counterparts in artificial metasurfaces.Such plasmon polaritons are rare,but experimentally revealed recently in WTe_(2)van der Waals thin films.Different from phonon polaritons,hyperbolic plasmon polaritons originate from the interplay of free carrier Drude response and interband transitions,which promise good intrinsic tunability.However,tunable in-plane hyperbolic plasmon polariton and its optical topological transition of the isofrequency contours to the elliptic topology in a natural material have not been realized.Here we demonstrate the tuning of the optical topological transition through Mo doping and temperature.The optical topological transition energy is tuned over a wide range,with frequencies ranging from 429 cm^(−1)(23.3 microns)for pure WTe_(2)to 270 cm^(−1)(37.0 microns)at the 50%Mo-doping level at 10 K.Moreover,the temperature-induced blueshift of the optical topological transition energy is also revealed,enabling active and reversible tuning.Surprisingly,the localized surface plasmon resonance in skew ribbons shows unusual polarization dependence,accurately manifesting its topology,which renders a reliable means to track the topology with far-field techniques.Our results open an avenue for reconfigurable photonic devices capable of plasmon polariton steering,such as canaling,focusing,and routing,and pave the way for low-symmetry plasmonic nanophotonics based on anisotropic natural materials. 展开更多
关键词 TOPOLOGICAL TRANSITIONS POLAR
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Observations of nodal lines in the topological semimetal ZrSnTe 被引量:1
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作者 Bo Chen Bo Zhang +6 位作者 JiHai Yu FuCong Fei Muhammad Naveed Yi Zhang Zhe Sun XianGang Wan fengqi song 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2020年第2期111-116,共6页
Performing angle-resolved photoemission spectroscopy(ARPES) and theoretical calculations for ZrSnTe, we find a nodal line in the kx-ky plane with a tiny gap and two nodal lines without gaps along the kzdirection. The ... Performing angle-resolved photoemission spectroscopy(ARPES) and theoretical calculations for ZrSnTe, we find a nodal line in the kx-ky plane with a tiny gap and two nodal lines without gaps along the kzdirection. The constant energy contours are plotted in the kx-ky plane at a photon energy of 30 e V to examine the gapping feature of the nodal line. In addition, we depict the band dispersions along the Γ-M and Γ-X directions from the ARPES images at photon energies ranging from 24 to 40 e V. The kz mapping confirms the presence of stable Dirac points with obvious kzdependences along the M-A and X-R directions. In this paper, we report the two types of nodal lines associated with the theoretical local-density approximation calculations, broadening the horizons of nodal-line semimetal research. 展开更多
关键词 nodal-line semimetals ZrSnTe ARPES
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Evidence for a Dirac nodal-line semimetal in SrAs_3 被引量:2
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作者 Shichao Li Zhaopeng Guo +11 位作者 Dongzhi Fu Xing-Chen Pan Jinghui Wang Kejing Ran song Bao Zhen Ma Zhengwei Cai Rui Wang Rui Yu Jian Sun fengqi song Jinsheng Wen 《Science Bulletin》 SCIE EI CSCD 2018年第9期535-541,共7页
Dirac nodal-line semimetals with the linear bands crossing along a line or loop, represent a new topological state of matter. Here, by carrying out magnetotransport measurements and performing first-principle calculat... Dirac nodal-line semimetals with the linear bands crossing along a line or loop, represent a new topological state of matter. Here, by carrying out magnetotransport measurements and performing first-principle calculations, we demonstrate that such a state has been realized in high-quality single crystals of SrAs_3.We obtain the nontrivial ∏ Berry phase by analysing the Shubnikov-de Haas quantum oscillations. We also observe a robust negative longitudinal magnetoresistance induced by the chiral anomaly.Accompanying first-principles calculations identifies that a single hole pocket enclosing the loop nodes is responsible for these observations. 展开更多
关键词 Dirac nodal-line semimetal Magnetoresistance Berry phase Quantum oscillations DFT calculations Chiral anomaly
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Carrier balance and linear magnetoresistance in type-II Weyl semimetal WTe2
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作者 Xing-Chen Pan Yiming Pan +15 位作者 Juan Jiang Huakun Zuo Huimei Liu Xuliang Chen Zhongxia Wei Shuai Zhang Zhihe Wang Xiangang Wan Zhaorong Yang Donglai Feng Zhengcai Xia Liang Li fengqi song Baigeng Wang Yuheng Zhang Guanghou Wang 《Frontiers of physics》 SCIE CSCD 2017年第3期73-80,共8页
Unsaturated magnetoresistance (MR) has been reported in type-II Weyl semimetal WTe2, manifested as a perfect compensation of opposite carriers. We report linear MR (LMR) in WTe2 crystals, the onset of which was id... Unsaturated magnetoresistance (MR) has been reported in type-II Weyl semimetal WTe2, manifested as a perfect compensation of opposite carriers. We report linear MR (LMR) in WTe2 crystals, the onset of which was identified by constructing the MR mobility spectra for weak fields. The LMR further increased and became dominant for fields stronger than 20 T, while the parabolic MR gradually decayed. The LMR was also observed in high-pressure conditions. 展开更多
关键词 WTe2 type-II Weyl semimetal carrier balance linear magnetoresistance
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A novel FZD6 mutation revealed the cause of cleft lip and/or palate in a Chinese family
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作者 Jieni Zhang Huaxiang Zhao +7 位作者 Wenbin Huang fengqi song Wenjie Zhong Mengqi Zhang Yunfan Zhang Zhibo Zhou Jiuxiang Lin Feng Chen 《Genes & Diseases》 SCIE 2020年第3期440-447,共8页
Cleft lip and/or palate(CL/P)is a most common craniofacial birth defect which has multifactorial etiology.In our study,we aimed to discover the underlying etiological gene variation in a Chinese family diagnosed as no... Cleft lip and/or palate(CL/P)is a most common craniofacial birth defect which has multifactorial etiology.In our study,we aimed to discover the underlying etiological gene variation in a Chinese family diagnosed as non-syndromic CL/P(NSCL/P).The blood sample of the proband and her parents were detected by whole exome sequencing.The Mendelian inheritance pattern,allele frequency,variation location,function analysis and literature search were applied to filtrate and screen the mutation.Besides,the candidates were confirmed by Sanger sequencing.We meanwhile explored the conservative analysis and protein homology simulation.As a result,a start-lost mutation c.1A>GAtg/Gtg in the Frizzled-6(FZD6)gene predicting p.Met1 was detected.The variation has not been reported before and was predicted to be harmful.The alteration caused missing of two starting amino acids that are evolutionarily conserved for FZD6 protein.Moreover,the specific structure of the mutant protein obviously changed according to the results of the homologous model.In conclusion,the results suggest c.1A>GAtg/Gtg in the FZD6(NM_001164616)might be the genetic etiology for non-syndromic CL/P in this pedigree.Furthermore,this finding provided new etiologic information,supplementing the evidence that FZD6 is a strong potential gene for CL/P. 展开更多
关键词 Cleft lip and/or palate Frizzled-6 Hereditary pedigree VARIANT Whole-exome sequencing
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