典型文献
Self-energy dynamics and the mode-specific phonon threshold effect in Kekulé-ordered graphene
文献摘要：
Electron-phonon interaction and related self-energy are fundamental to both the equilibrium properties and non-equilibrium relaxation dynamics of solids.Although electron-phonon interaction has been suggested by various time-resolved measurements to be important for the relaxation dynamics of graphene,the lack of energy-and momentum-resolved self-energy dynamics prohibits direct identification of the role of specific phonon modes in the relaxation dynamics.Here,by performing time-and angle-resolved photoemission spectroscopy measurements on Kekulé-ordered graphene with folded Dirac cones at the T point,we have succeeded in resolving the self-energy effect induced by the coupling of electrons to two phonons at Ω1=177 meV and Ω2=54 meV,and revealing its dynamical change in the time domain.Moreover,these strongly coupled phonons define energy thresholds,which separate the hierarchical relaxation dynamics from ultrafast,fast to slow,thereby providing direct experimental evidence for the dominant role of mode-specific phonons in the relaxation dynamics.
文献关键词：
中图分类号：
作者姓名：
Hongyun Zhang;Changhua Bao;Michael Schüler;Shaohua Zhou;Qian Li;Laipeng Luo;Wei Yao;Zhong Wang;Thomas P.Devereaux;Shuyun Zhou
作者机构：
State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics,Tsinghua University,Beijing 100084,China;Stanford Institute for Materials and Energy Sciences(SIMES),SLAC National Accelerator Laboratory,Menlo Park,CA 94025,USA;Institute for Advanced Study,Tsinghua University,Beijing 100084,China;Department of Materials Science and Engineering,Stanford University,Stanford,CA 94035,USA;Frontier Science Center for Quantum Information,Beijing 100084,China
文献出处：
引用格式：
[1]Hongyun Zhang;Changhua Bao;Michael Schüler;Shaohua Zhou;Qian Li;Laipeng Luo;Wei Yao;Zhong Wang;Thomas P.Devereaux;Shuyun Zhou-.Self-energy dynamics and the mode-specific phonon threshold effect in Kekulé-ordered graphene)[J].国家科学评论（英文版）,2022(05):76-83
A类：
Kekul
B类：
Self,energy,dynamics,specific,effect,ordered,graphene,Electron,interaction,related,self,are,fundamental,both,equilibrium,properties,relaxation,solids,Although,has,been,suggested,various,resolved,measurements,important,lack,momentum,prohibits,direct,identification,role,modes,Here,performing,angle,photoemission,spectroscopy,folded,Dirac,cones,point,we,have,succeeded,resolving,induced,coupling,electrons,two,phonons,meV,revealing,dynamical,change,domain,Moreover,these,strongly,coupled,define,thresholds,which,separate,hierarchical,from,ultrafast,slow,thereby,providing,experimental,evidence,dominant
AB值：
0.510854
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