Chin. Phys. Lett.  2022, Vol. 39 Issue (5): 057801    DOI: 10.1088/0256-307X/39/5/057801
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Phase-Locking Diffusive Skin Effect
Pei-Chao Cao1, Yu-Gui Peng1, Ying Li2,3,4*, and Xue-Feng Zhu1*
1School of Physics and Innovation Institute, Huazhong University of Science and Technology, Wuhan 430074, China
2Interdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310027, China
3International Joint Innovation Center, Key Laboratory of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, The Electromagnetics Academy at Zhejiang University, Zhejiang University, Haining 314400, China
4Jinhua Institute of Zhejiang University, Zhejiang University, Jinhua 321099, China
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Pei-Chao Cao, Yu-Gui Peng, Ying Li et al  2022 Chin. Phys. Lett. 39 057801
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Abstract We explore the exceptional point (EP) induced phase transition and amplitude/phase modulation in thermal diffusion systems. We start from the asymmetric coupling double-channel model, where the temperature field is unbalanced in the amplitude and locked in the symmetric phase. By extending into the one-dimensional tight-binding non-Hermitian lattice, we study the convection-driven phase locking and the asymmetric-coupling-induced diffusive skin effect with the high-order EPs in static systems. Combining convection and asymmetric couplings, we further show the phase-locking diffusive skin effect. Our work reveals the mechanism of controlling both the amplitude and phase of temperature fields in thermal coupling systems and has potential applications in non-Hermitian topology in thermal diffusion.
Received: 04 March 2022      Express Letter Published: 12 April 2022
PACS:  78.67.Pt (Multilayers; superlattices; photonic structures; metamaterials)  
  44.10.+i (Heat conduction)  
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http://cpl.iphy.ac.cn/10.1088/0256-307X/39/5/057801       OR      http://cpl.iphy.ac.cn/Y2022/V39/I5/057801
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Pei-Chao Cao
Yu-Gui Peng
Ying Li
and Xue-Feng Zhu
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