Terahertz dynamics of topological insulator Bi2Se3: Ultrafast photoexcitation suppresses hot-Dirac electron surface scattering

Sangwan Sim, Matthew Brahlek, Nikesh Koirala, Soonyoung Cha, Seongshik Oh, Hyunyong Choi

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

We present ultrafast terahertz scattering dynamics in topological insulator Bi2Se3 thin films. Upon photoexcitation, the surface-scattering rate is increased, resulting in decrease of conductance. At high temperature, however, the photo-generated electrons suppress the surfacescattering.

Original languageEnglish
Publication statusPublished - 2014
Event2014 Conference on Lasers and Electro-Optics, CLEO 2014 - San Jose, United States
Duration: 2014 Jun 82014 Jun 13

Other

Other2014 Conference on Lasers and Electro-Optics, CLEO 2014
CountryUnited States
CitySan Jose
Period14/6/814/6/13

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials

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