首页|Frustrated superconductivity and sextetting order

Frustrated superconductivity and sextetting order

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The superconducting state typically favors a uniform spatial distribution akin to ferromagnetism.Nevertheless,the pair-density-wave state exhibits sign changes in the pairing order,leading to potential frustrations in phase coherence.We propose a mech-anism to the sextetting order stemming from the frustrations in the phase coherence of a pair-density-wave state,whose spatial modulation manifests a vortex-antivortex honeycomb lattice.The classical ground state configurations are mapped to Baxter's three-coloring model,revealing a macroscopic degeneracy accompanied by extensive entropy.The phase coherence problem intertwines the U(1)phases and the vorticity variables.While the resultant color and phase fluctuations suppress the pair-density-wave order,they maintain the sextetting order above the superconducting transition temperature(Tc).The 1/3-fractional vortex emerges as the fundamental topological defect in the sextetting order.This novel mechanism of frustrated superconductivity provides an alternative explanation for the experimental observed fractional oscillations in CsV3Sb5.

frustrated superconductivitypair density wavecharge-6e order

Zhiming Pan、Chen Lu、Fan Yang、Congjun Wu

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Institute for Theoretical Sciences,Westlake University,Hangzhou 310024,China

New Cornerstone Science Laboratory,Department of Physics,School of Science,Westlake University,Hangzhou 310024,China

School of Physics,Beijing Institute of Technology,Beijing 100081,China

Institute for Theoretical Sciences,Westlake University Hangzhou 310024,China

Key Laboratory for Quantum Materials of Zhejiang Province,School of Science,Westlake University,Hangzhou 310024,China

Institute of Natural Sciences,Westlake Institute for Advanced Study,Hangzhou 310024,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNew Cornerstone Science FoundationNational Natural Science Foundation of ChinaNational Natural Science Foundation of China

12234016121743171207403112304180

2024

10.1007/s11433-024-2396-y

中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
年,卷(期)：2024.67(8)