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

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

doi:10.1364/cleo_qels.2014.fth3c.7

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

Sim, Sangwan;
Brahlek, Matthew;
Koirala, Nikesh;
Cha, Soonyoung;
Oh, Seongshik;
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초록

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.

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

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

DOI: 10.1364/cleo_qels.2014.fth3c.7

발행일: 2014-06

유형: Proceedings Paper

저널명: 2014 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)

페이지: 1 ~ 2

언어: ENG

출판사: IEEE

발행국가: 미국

분량: 2 페이지

ISSN: P 2160-9020