Spin and charge transport through a helical Aharonov-Bohm interferometer with a strong magnetic impurity
作者： V. Yu. Kachorovskii , V. Yu. Kachorovskii , D. N. Aristov , D. N. Aristov , D. N. Aristov
DOI: 10.1103/PHYSREVB.103.125428
关键词: Condensed matter physics 、 Physics 、 Magnetic impurity 、 Spin (physics) 、 Interferometry 、 Amplitude 、 Electron 、 Quantum tunnelling 、 Charge (physics) 、 Spin polarization
摘要: We discuss transport through an interferometer formed by the helical edge states of a quantum spin Hall insulator. Focusing on effects induced strong magnetic impurity placed in one arms interferometer, we consider experimentally relevant case relatively high temperature as compared to level spacing. obtain conductance and polarization closed form for arbitrary tunneling amplitude contacts strength impurity. demonstrate existence which do not show up previously studied cases weak disorder. find optimal conditions filtering that outgoing electrons can reach 100%.
arxiv.org
sci-hub.st 参考文章(43)
B Andrei Bernevig, Taylor L Hughes, Topological Insulators and Topological Superconductors ,(2013)
Rui-Lin Chu, Jian Li, J. K. Jain, Shun-Qing Shen, Coherent oscillations and giant edge magnetoresistance in singly connected topological insulators Physical Review B. ,vol. 80, pp. 081102- ,(2009) , 10.1103/PHYSREVB.80.081102
Gonzalo Usaj, Edge states interferometry and spin rotations in zigzag graphene nanoribbons Physical Review B. ,vol. 80, pp. 081414- ,(2009) , 10.1103/PHYSREVB.80.081414
Fabrizio Dolcini, Full electrical control of charge and spin conductance through interferometry of edge states in topological insulators Physical Review B. ,vol. 83, pp. 165304-1- 165304-11 ,(2011) , 10.1103/PHYSREVB.83.165304
Christoph Brüne, Andreas Roth, Hartmut Buhmann, Ewelina M. Hankiewicz, Laurens W. Molenkamp, Joseph Maciejko, Xiao-Liang Qi, Shou-Cheng Zhang, Spin polarization of the quantum spin Hall edge states Nature Physics. ,vol. 8, pp. 485- 490 ,(2012) , 10.1038/NPHYS2322
Pierre Delplace, Jian Li, Markus Büttiker, Magnetic-field-induced localization in 2D topological insulators. Physical Review Letters. ,vol. 109, pp. 246803- ,(2012) , 10.1103/PHYSREVLETT.109.246803
Xiao-Liang Qi, Shou-Cheng Zhang, Topological insulators and superconductors Reviews of Modern Physics. ,vol. 83, pp. 1057- 1110 ,(2011) , 10.1103/REVMODPHYS.83.1057
Ivan Knez, Rui-Rui Du, Gerard Sullivan, Evidence for helical edge modes in inverted InAs/GaSb quantum wells. Physical Review Letters. ,vol. 107, pp. 136603- 136603 ,(2011) , 10.1103/PHYSREVLETT.107.136603
Song-Bo Zhang, Yan-Yang Zhang, Shun-Qing Shen, Robustness of quantum spin Hall effect in an external magnetic field Physical Review B. ,vol. 90, pp. 115305- ,(2014) , 10.1103/PHYSREVB.90.115305
C. L. Kane, E. J. Mele, Quantum spin Hall effect in graphene Physical Review Letters. ,vol. 95, pp. 226801- 226801 ,(2005) , 10.1103/PHYSREVLETT.95.226801