首页|Nonreciprocal transport in the superconducting state of the chiral crystal NbGe2
Nonreciprocal transport in the superconducting state of the chiral crystal NbGe2
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Due to the lack of inversion,mirror or other roto-inversion symmetries,chiral crystals possess a well-defined hand-edness which,when combined with time-reversal symmetry breaking from the application of magnetic fields,can give rise to directional dichroism of the electrical transport phenomena via the magnetochiral anisotropy.In this study,we inves-tigate the nonreciprocal magneto-transport in microdevices of NbGe2,a superconductor with structural chirality.A giant nonreciprocal signal from vortex motions is observed during the superconducting transition,with the ratio of nonrecipro-cal resistance to the normal resistance γ reaching 6×105 T-1·A-1.Interestingly,the intensity can be adjusted and even sign-reversed by varying the current,the temperature,and the crystalline orientation.Our findings illustrate intricate vortex dynamics and offer ways of manipulation on the rectification effect in superconductors with structural chirality.
chiral crystalsmagnetochiral anisotropysuperconducting vortexnonreciprocal transport
刘永来、许锡童、何苗、赵海天、曾庆祺、杨星宇、邹优鸣、杜海峰、屈哲
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Anhui Key Laboratory of Low-Energy Quantum Materials and Devices,CAS Key Laboratory of Photovoltaic and Energy Conservation Materials,High Magnetic Field Laboratory of Chinese Academy of Sciences(CHMFL),HFIPS,CAS,Hefei 230031,China
Science Island Branch of Graduate School,University of Science and Technology of China,Hefei 230026,China
国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金中国科学院项目中国科学院项目High Magnetic Field Laboratory of Anhui Province
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