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Emergent energy dissipation in quantum limit

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Energy dissipation is of fundamental interest and crucial importance in quantum systems.However,whether energy dissipation can emerge without backscattering inside topological systems remains a question.As a hallmark,we propose a microscopic picture that illustrates energy dissipation in the quan-tum Hall(QH)plateau regime of graphene.Despite the quantization of Hall,longitudinal,and two-probe resistances(dubbed as the quantum limit),we find that the energy dissipation emerges in the form of Joule heat.It is demonstrated that the non-equilibrium energy distribution of carriers plays much more essential roles than the resistance on energy dissipation.Eventually,we suggest probing the phenomenon by measuring local temperature increases in experiments and reconsidering the dissipation typically ignored in realistic topological circuits.

Energy dissipationTopological systemsNon-equilibrium energy distributionChem insulatorsQuantum limit

Hailong Li、Hua Jiang、Qing-Feng Suna、X.C.Xie

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International Center for Quantum Materials,School of Physics,Peking University,Beijing 100871,China

Interdisciplinary Center for Theoretical Physics and Information Sciences(ICTPIS),Fudan University,Shanghai 200433,China

Institute for Nanoelectronic Devices and Quantum Computing,Fudan University,Shanghai 200433,China

CAS Center for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing 100190,China

Hefei National Laboratory,Hefei 230088,China

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国家重点研发计划国家重点研发计划Innovation Program for Quantum Science and Technology国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金中国科学院战略规划重点项目中国博士后科学基金

2019YFA03084032022YFA14037002021ZD030240012350401123040521237403411921005XDB28000000BX20220005

2024

10.1016/j.scib.2024.03.024

科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
年,卷(期)：2024.69(9)
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