首页|Valleytronic topological filters in silicene-like inner-edge systems

Valleytronic topological filters in silicene-like inner-edge systems

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Inner edge state with spin and valley degrees of freedom is a promising candidate for designing a dissipationless device due to the topological protection.The central challenge for the application of the inner edge state is to generate and modulate the polarized currents.In this work,we discover a new mechanism to generate fully valley-and spin-valley-polarized current caused by the Bloch wavevector mismatch(BWM).Based on this mechanism,we design some serial-typed inner-edge filters.By using once of the BWM,the coincident states could be divided into transmitted and reflected modes,which can serve as a valley or spin-valley filter.In particular,while with twice of the BWM,the incident current is absolutely reflected to support an off state with a specified valley and spin,which is different from the gap effect.These findings give rise to a new platform for designing valleytronics and spin-valleytronics.

topological insulatorinner-edge statevalley polarizationspin polarizationquantum transport

谢航、吕小龙、杨加恩

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College of Physics,Chongqing University,Chongqing 401331,China

Chongqing Key Laboratory for Strongly-Coupled Physics,Chongqing University,Chongqing 401331,China

College of Science,Guangxi University of Science and Technology,Liuzhou 545006,China

School of Electronics and IoT,Chongqing College of Electronic Engineering,Chongqing 401331,China

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National Natural science Foundation of ChinaNational Natural science Foundation of ChinaScientific and Technological Research Program of Chongqing Municipal Education CommissionSpecific Research Project of Guangxi for Research Bases and TalentsFoundation of Guangxi University of Science and Technology

1220407312147102KJQN2023031052022AC2107721Z52

2024

10.1088/1674-1056/ad0714

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(1)
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