Emergent energy dissipation in quantum limit

Hailong Li ¹Hua Jiang ²Qing-Feng Suna ³X.C.Xie⁴

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作者信息

1. International Center for Quantum Materials,School of Physics,Peking University,Beijing 100871,China
2. 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
3. International Center for Quantum Materials,School of Physics,Peking University,Beijing 100871,China;CAS Center for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing 100190,China;Hefei National Laboratory,Hefei 230088,China
4. 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;Hefei National Laboratory,Hefei 230088,China
折叠

Abstract

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.

Key words

Energy dissipation/Topological systems/Non-equilibrium energy distribution/Chem insulators/Quantum limit

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基金项目

国家重点研发计划(2019YFA0308403)

国家重点研发计划(2022YFA1403700)

Innovation Program for Quantum Science and Technology(2021ZD0302400)

国家自然科学基金(12350401)

国家自然科学基金(12304052)

国家自然科学基金(12374034)

国家自然科学基金(11921005)

中国科学院战略规划重点项目(XDB28000000)

中国博士后科学基金(BX20220005)

出版年

2024

科学通报(英文版)

中国科学院

科学通报(英文版)

CSTPCD

ISSN：1001-6538

参考文献量63

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