CrP has many exotic physical properties due to a four-fold degenerate band crossing at the Y point of the Brillouin zone,which is protected by the nonsymmorphic symmetry of the space group.We carried out the heat capa...CrP has many exotic physical properties due to a four-fold degenerate band crossing at the Y point of the Brillouin zone,which is protected by the nonsymmorphic symmetry of the space group.We carried out the heat capacity,electrical and thermal transport measurements on CrP and extracted the electron thermal conductivity.Due to the difference in energy and momentum relaxation time during electron-phonon inelastic scattering,the normalized Lorentz number decreases below about 160 K.Below 25.6 K,the normalized Lorentz number begins to recover,which is due to the dominance of elastic scattering between electrons and defects at low temperatures.展开更多
Magnetic topological materials have attracted much attention due to the correlation between topology and magnetism.Recent studies suggest that EuCd_(2)As_(2) is an antiferromagnetic topological material.Here by carryi...Magnetic topological materials have attracted much attention due to the correlation between topology and magnetism.Recent studies suggest that EuCd_(2)As_(2) is an antiferromagnetic topological material.Here by carrying out thorough magnetic,electrical and thermodynamic property measurements,we discover a long-time relaxation of the magnetic susceptibility in EuCd_(2)As_(2).The(001)in-plane magnetic susceptibility at 5 K is found to continuously increase up to∼10%over the time of∼14 hours.The magnetic relaxation is anisotropic and strongly depends on the temperature and the applied magnetic field.These results will stimulate further theoretical and experimental studies to understand the origin of the relaxation process and its effect on the electronic structure and physical properties of the magnetic topological materials.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.12134018,11921004,and 11634015)the National Key Research and Development Program of China(Grant Nos.2022YFA1602800,2021YFA1401800,2017YFA0302901,2017YFA0302903,and 2022YFA1402203)+1 种基金the Strategic Priority Research Program and Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(Grant No.XDB33010100)the Synergetic Extreme Condition User Facility(SECUF).
文摘CrP has many exotic physical properties due to a four-fold degenerate band crossing at the Y point of the Brillouin zone,which is protected by the nonsymmorphic symmetry of the space group.We carried out the heat capacity,electrical and thermal transport measurements on CrP and extracted the electron thermal conductivity.Due to the difference in energy and momentum relaxation time during electron-phonon inelastic scattering,the normalized Lorentz number decreases below about 160 K.Below 25.6 K,the normalized Lorentz number begins to recover,which is due to the dominance of elastic scattering between electrons and defects at low temperatures.
基金Supported by the National Key Research and Development Program of China(Grant Nos.2016YFA0300600 and 2018YFA0305600)the National Natural Science Foundation of China(Grant No.11974404)+1 种基金the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(Grant No.XDB33000000)the Youth Innovation Promotion Association of CAS(Grant No.2017013).
文摘Magnetic topological materials have attracted much attention due to the correlation between topology and magnetism.Recent studies suggest that EuCd_(2)As_(2) is an antiferromagnetic topological material.Here by carrying out thorough magnetic,electrical and thermodynamic property measurements,we discover a long-time relaxation of the magnetic susceptibility in EuCd_(2)As_(2).The(001)in-plane magnetic susceptibility at 5 K is found to continuously increase up to∼10%over the time of∼14 hours.The magnetic relaxation is anisotropic and strongly depends on the temperature and the applied magnetic field.These results will stimulate further theoretical and experimental studies to understand the origin of the relaxation process and its effect on the electronic structure and physical properties of the magnetic topological materials.
