Frustrated superconductivity and sextetting order

作     者：Zhiming Pan Chen Lu Fan Yang Congjun Wu 

作者机构：Institute for Theoretical SciencesWestlake UniversityHangzhou 310024China New Cornerstone Science LaboratoryDepartment of PhysicsSchool of ScienceWestlake UniversityHangzhou 310024China School of PhysicsBeijing Institute of TechnologyBeijing 100081China Key Laboratory for Quantum Materials of Zhejiang ProvinceSchool of ScienceWestlake UniversityHangzhou 310024China Institute of Natural SciencesWestlake Institute for Advanced StudyHangzhou 310024China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2024年第67卷第8期

页      面：168-176页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12234016 and 12174317) supported by the National Natural Science Foundation of China(Grant No.12074031) supported by the National Natural Science Foundation of China(Grant No.12304180) supported by the New Cornerstone Science Foundation 

主　　题：frustrated superconductivity pair density wave charge-6e order 

摘      要：The superconducting state typically favors a uniform spatial distribution akin to ***,the pair-densitywave state exhibits sign changes in the pairing order,leading to potential frustrations in phase *** propose a mechanism 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 *** classical ground state configurations are mapped to Baxter s three-coloring model,revealing a macroscopic degeneracy accompanied by extensive *** phase coherence problem intertwines the U(1)phases and the vorticity *** the resultant color and phase fluctuations suppress the pair-densitywave order,they maintain the sextetting order above the superconducting transition temperature(T_(c)).The 1/3-fractional vortex emerges as the fundamental topological defect in the sextetting *** novel mechanism of frustrated superconductivity provides an alternative explanation for the experimental observed fractional oscillations in CsV_(3)Sb_(5).