Numerical study of the quantum valley Hall effect
S. K. Wang, Jun Wang, and Jun-Feng Liu
TL;DR
This paper critically examines the quantum valley Hall effect, questioning the validity of bulk valley current mediated nonlocal resistance and suggesting alternative explanations for experimental signals.
Contribution
It challenges the interpretation of nonlocal resistance as bulk valley current mediated, reaffirming the Landauer-Buttiker formalism's correctness.
Findings
Bulk valley current mediated nonlocal resistance is inconsistent with Landauer-Buttiker formalism.
Experimental signals attributed to bulk valley current may have other origins.
The Landauer-Buttiker formalism remains a valid framework for understanding these phenomena.
Abstract
Under more consideration, it seems that bulk valley current mediated nonlocal resistance is inconsistent with Landau-Buttiker formalism. We believe Landau-Buttiker formalism is right and the declared bulk valley current mediated nonlocal resistance is questionable and the experimental signal should be attributed to other origins.
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Taxonomy
TopicsQuantum and electron transport phenomena · Surface and Thin Film Phenomena · Semiconductor Quantum Structures and Devices