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

doi:10.1364/cleo_qels.2014.fth3c.7

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 proceeding › Conference contribution › peer-review

2 Scopus citations

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 language	English
Title of host publication	CLEO
Subtitle of host publication	QELS_Fundamental Science, CLEO_QELS 2014
Publisher	Optical Society of America (OSA)
ISBN (Print)	9781557529992, 9781557529992
DOIs	https://doi.org/10.1364/cleo_qels.2014.fth3c.7
State	Published - 2014
Externally published	Yes
Event	CLEO: QELS_Fundamental Science, CLEO_QELS 2014 - San Jose, CA, United States Duration: Jun 8 2014 → Jun 13 2014

Publication series

Name	Optics InfoBase Conference Papers
ISSN (Electronic)	2162-2701

Conference

Conference	CLEO: QELS_Fundamental Science, CLEO_QELS 2014
Country/Territory	United States
City	San Jose, CA
Period	06/8/14 → 06/13/14

Access to Document

10.1364/cleo_qels.2014.fth3c.7

Cite this

@inproceedings{d4a2f148e41348d79b1eb0d88bb9ed25,

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

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.",

author = "Sangwan Sim and Matthew Brahlek and Nikesh Koirala and Soonyoung Cha and Seongshik Oh and Hyunyong Choi",

year = "2014",

doi = "10.1364/cleo_qels.2014.fth3c.7",

language = "English",

isbn = "9781557529992",

series = "Optics InfoBase Conference Papers",

publisher = "Optical Society of America (OSA)",

booktitle = "CLEO",

note = "CLEO: QELS_Fundamental Science, CLEO_QELS 2014 ; Conference date: 08-06-2014 Through 13-06-2014",

}

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 America (OSA), CLEO: QELS_Fundamental Science, CLEO_QELS 2014, San Jose, CA, United States, 06/8/14. https://doi.org/10.1364/cleo_qels.2014.fth3c.7

Terahertz dynamics of topological insulator Bi₂Se₃: Ultrafast photoexcitation suppresses hot-Dirac electron surface scattering. / Sim, Sangwan; Brahlek, Matthew; Koirala, Nikesh et al.
CLEO: QELS_Fundamental Science, CLEO_QELS 2014. Optical Society of America (OSA), 2014. (Optics InfoBase Conference Papers).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Koirala, Nikesh

AU - Cha, Soonyoung

AU - Oh, Seongshik

AU - Choi, Hyunyong

PY - 2014

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AB - 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.

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SN - 9781557529992

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