物理
凝聚态物理
高原(数学)
量子霍尔效应
拓扑(电路)
量子
消散
量子力学
电子
数学
组合数学
数学分析
作者
Jingyun Fang,Ning-Xuan Yang,Qing Yan,Aimin Guo,Qing-Feng Sun
出处
期刊:Physical review
日期:2021-09-10
卷期号:104 (11)
被引量:10
标识
DOI:10.1103/physrevb.104.115411
摘要
It is widely accepted that both backscattering and dissipation cannot occur in topological systems because of the topological protection. Here we show that the thermal dissipation can occur in the quantum Hall (QH) regime in graphene in the presence of dissipation sources, although the Hall plateaus and the zero longitudinal resistance still survive. Dissipation appears along the downstream chiral flow direction of the constriction in the Hall plateau regime, but it occurs mainly in the bulk in the Hall plateau transition regime. In addition, dissipation processes are accompanied with the evolution of the energy distribution from non-equilibrium to equilibrium. This indicates that topology neither prohibits the appearance of dissipation nor prohibits entropy increasing, which opens a new topic on the dissipation in topological systems.
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