Ultralow-temperature heat transport study of noncentrosymmetric superconductor CaPtAs

作     者：万一民 程二建 陈宇鑫 赵成成 涂成鹏 戴东喆 杨小帆 辛路 谢武 袁辉球 李世燕 Yimin Wan;Erjian Cheng;Yuxin Chen;Chengcheng Zhao;Chengpeng Tu;Dongzhe Dai;Xiaofan Yang;Lu Xin;Wu Xie;Huiqiu Yuan;Shiyan Li

作者机构：State Key Laboratory of Surface Physics and Department of PhysicsFudan UniversityShanghai 200438China Leibniz Institute for Solid State and Materials Research(IFW-Dresden)01069 DresdenGermany Center for Correlated Matter and School of PhysicsZhejiang UniversityHangzhou 310058China Collaborative Innovation Center of Advanced MicrostructuresNanjing 210093China Shanghai Research Center for Quantum SciencesShanghai 201315China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2023年第32卷第12期

页      面：158-161页

核心收录：

学科分类：080705[工学-制冷及低温工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0807[工学-动力工程及工程热物理] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China (Grant No.12174064) the National Key R&D Program of China (Grant No.2022YFA1402200) the Shanghai Municipal Science and Technology Major Project (Grant No.2019SHZDZX01) 

主　　题：noncentrosymmetric superconductor thermal conductivity superconducting gap structure 

摘      要：The noncentrosymmetric superconductor CaPtAs with time-reversal symmetry breaking in its superconducting state was previously proposed to host nodal ***,by employing ultralow-temperature thermal conductivity measurement on CaPtAs single crystal,we study its superconducting gap structure.A negligible residual linear term of thermal conductivity(κ_(0)/T)in zero magnetic field and the field dependence ofκ_(0)/T indicate that CaPtAs has multiple superconducting gaps with a dominant s-wave *** is consistent with recent nuclear quadrupole resonance measurements on *** work puts a strong constraint on the theories to describe the superconducting pairing symmetry of CaPtAs.