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: Chapter in Book/Report/Conference proceedingConference contribution

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 surface scattering.

Original languageEnglish (US)
Title of host publicationCLEO
Subtitle of host publicationQELS_Fundamental Science, CLEO_QELS 2014
PublisherOptical Society of American (OSA)
ISBN (Print)9781557529992
StatePublished - Jan 1 2014
EventCLEO: QELS_Fundamental Science, CLEO_QELS 2014 - San Jose, CA, United States
Duration: Jun 8 2014Jun 13 2014

Publication series

NameOptics InfoBase Conference Papers
ISSN (Electronic)2162-2701

Other

OtherCLEO: QELS_Fundamental Science, CLEO_QELS 2014
CountryUnited States
CitySan Jose, CA
Period6/8/146/13/14

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'Terahertz dynamics of topological insulator Bi<sub>2</sub>Se<sub>3</sub>: Ultrafast photoexcitation suppresses hot-Dirac electron surface scattering'. Together they form a unique fingerprint.

  • Cite this

    Sim, S., Brahlek, M., Koirala, N., Cha, S., Oh, S., & Choi, H. (2014). Terahertz dynamics of topological insulator Bi2Se3: Ultrafast photoexcitation suppresses hot-Dirac electron surface scattering. In CLEO: QELS_Fundamental Science, CLEO_QELS 2014 (Optics InfoBase Conference Papers). Optical Society of American (OSA).