首页|Transport properties of Hall-type quantum states in disordered bismuthene

Transport properties of Hall-type quantum states in disordered bismuthene

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Bismuthene,an inherently hexagonal structure characterized by a huge bulk gap,offers a versatile platform for in-vestigating the electronic transport of various topological quantum states.Using nonequilibrium Green's function method and Landauer-Büttiker formula,we thoroughly investigate the transport properties of various Hall-type quantum states,including quantum spin Hall(QSH)edge states,quantum valley Hall kink(QVHK)states,and quantum spin-valley Hall kink(QSVHK)states,in the presence of various disorders.Based on the exotic transport features,a spin-valley filter,capable of generating a highly spin-and valley-polarized current,is proposed.The valley index and the spin index of the filtered QSVHK state are determined by the staggered potential and the intrinsic spin-orbit coupling,respectively.The efficiency of the spin-valley filter is supported by the spacial current distribution,the valley-resolved conductance,and the spin-resolved conductance.Compared with a sandwich structure for QSVHK,our proposed spin-valley filter can work with a much smaller size and is more accessible in the experiment.

electronic transportbismuthenespin-valley filter

周娇娇、余江应、成淑光、江华

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Key Laboratory of Advanced Electronic Materials and Devices,School of Mathematics and Physics,Anhui Jianzhu University,Hefei 230601,China

Department of Physics,Northwest University,Xi'an 710069,China

School of Physical Science and Technology,Soochow University,Suzhou 215006,China

国家自然科学基金安徽省自然科学基金Key Research and Development Plan of Anhui Province of ChinaMajor Science and Technology Project of Anhui Province of ChinaDoctor Foundation of Anhui Jianzhu University

121040122108085MB42202104a050200482021eO30200072019QDZ45

2024

10.1088/1674-1056/ad2605

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(4)
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