Quantitative Measurement of Temperature-Dependent Quasiparticle Scattering of the Topological Surface States in Bi_(2)Se_(3)  

作　　者：Shengyue Lu Yeqinbo Zhang Xueyan Ma Jingze Li Yongkai Deng Yunquan Liu 

机构地区：[1]State Key Laboratory for Mesoscopic Physics and Collaborative Innovation Center of Quantum Matter,School of Physics,Peking University,Beijing 100871,China [2]Beijing Academy of Quantum Information Sciences,Beijing 100193,China [3]Collaborative Innovation Center of Quantum Matter,Beijing 100871,China [4]Peking University Yangtze Delta Institute of Optoelectronics,Nantong 226010,China

出　　处：《Chinese Physics Letters》2025年第1期153-162,共10页中国物理快报(英文版)

基　　金：supported by the National Key R&D Program of China(Grant No.2022YFA1604301);the Natural Science Foundation of China(Grant Nos.12334013,12204018,92050201;92250306)。

摘　　要：The quasiparticle scattering processes of the topological surface state(TSS)in three-dimensional topological insulators(TIs)have a vital effect on the many-body interactions and potential applications of topological materials.In this study,we performed high-resolution temperature-dependent angle-resolved photoemission spectroscopy analysis of the 3D strong TI Bi_(2)Se_(3).Using an ab initio simulation,we analyzed the temperature dependence of the electronic structure and lifetime broadening of the TSS,which are closely associated with the quasiparticle scattering process,i.e.,electron–phonon coupling and spin-dependent scattering.We show that,at a low temperature(7 K),the spin-dependent electron scattering facilitates the anisotropic scattering rate of the TSS.Conversely,at room temperature(300 K),the electron–phonon coupling dominates the contribution to the scattering rate.The scattering rate increases with temperature and becomes uniform in momentum space owing to the temperature dependence of quasiparticle scattering.The quantitative study of temperature-dependent scattering rates in TSS is crucial to understanding the topological property and transport mobility of Dirac fermions for fundamental studies and potential applications.

关 键 词：SCATTERING materials TOPOLOGICAL 

分 类 号：O57[理学—粒子物理与原子核物理]