Terahertz spectroscopy of topological insulator Sb2Se3 and its ultrafast nonequilibrium carrier dynamics

Jaehun Park; Tae Hyeon Kim; Kwangsik Jeong; Hyejin Choi; Seonghoon Jung; Mann Ho Cho

doi:10.1109/IRMMW-THz.2016.7758796

Terahertz spectroscopy of topological insulator Sb₂Se₃ and its ultrafast nonequilibrium carrier dynamics

Jaehun Park, Tae Hyeon Kim, Kwangsik Jeong, Hyejin Choi, Seonghoon Jung, Mann Ho Cho

Department of Physics

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

Abstract

Tuning the band structure of a topological insulator is of interest for developing electronic devices or superconducting devices. Here we report the strain-dependent results for Bi₂Se₃ films of various thicknesses that are grown via a self-organized ordering process. From the UV photoemission/inverse photoemission spectroscopy (UPS/IPES) results, ab initio calculations and THz-TDS data, significant changes of the Fermi level and band gap were observed.

Original language	English
Title of host publication	41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016
Publisher	IEEE Computer Society
ISBN (Electronic)	9781467384858
DOIs	https://doi.org/10.1109/IRMMW-THz.2016.7758796
Publication status	Published - 2016 Nov 28
Event	41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 - Copenhagen, Denmark Duration: 2016 Sep 25 → 2016 Sep 30

Publication series

Name	International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
Volume	2016-November
ISSN (Print)	2162-2027
ISSN (Electronic)	2162-2035

Other

Other	41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016
Country	Denmark
City	Copenhagen
Period	16/9/25 → 16/9/30

Bibliographical note

Publisher Copyright:
© 2016 IEEE.

All Science Journal Classification (ASJC) codes

Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1109/IRMMW-THz.2016.7758796

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Park, J., Kim, T. H., Jeong, K., Choi, H., Jung, S., & Cho, M. H. (2016). Terahertz spectroscopy of topological insulator Sb₂Se₃ and its ultrafast nonequilibrium carrier dynamics. In 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 [7758796] (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz; Vol. 2016-November). IEEE Computer Society. https://doi.org/10.1109/IRMMW-THz.2016.7758796

Park, Jaehun ; Kim, Tae Hyeon ; Jeong, Kwangsik ; Choi, Hyejin ; Jung, Seonghoon ; Cho, Mann Ho. / Terahertz spectroscopy of topological insulator Sb₂Se₃ and its ultrafast nonequilibrium carrier dynamics. 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016. IEEE Computer Society, 2016. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz).

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abstract = "Tuning the band structure of a topological insulator is of interest for developing electronic devices or superconducting devices. Here we report the strain-dependent results for Bi2Se3 films of various thicknesses that are grown via a self-organized ordering process. From the UV photoemission/inverse photoemission spectroscopy (UPS/IPES) results, ab initio calculations and THz-TDS data, significant changes of the Fermi level and band gap were observed.",

author = "Jaehun Park and Kim, {Tae Hyeon} and Kwangsik Jeong and Hyejin Choi and Seonghoon Jung and Cho, {Mann Ho}",

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Park, J, Kim, TH, Jeong, K, Choi, H, Jung, S & Cho, MH 2016, Terahertz spectroscopy of topological insulator Sb₂Se₃ and its ultrafast nonequilibrium carrier dynamics. in 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016., 7758796, International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, vol. 2016-November, IEEE Computer Society, 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016, Copenhagen, Denmark, 16/9/25. https://doi.org/10.1109/IRMMW-THz.2016.7758796

Terahertz spectroscopy of topological insulator Sb₂Se₃ and its ultrafast nonequilibrium carrier dynamics. / Park, Jaehun; Kim, Tae Hyeon; Jeong, Kwangsik; Choi, Hyejin; Jung, Seonghoon; Cho, Mann Ho.

41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016. IEEE Computer Society, 2016. 7758796 (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz; Vol. 2016-November).

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

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AB - Tuning the band structure of a topological insulator is of interest for developing electronic devices or superconducting devices. Here we report the strain-dependent results for Bi2Se3 films of various thicknesses that are grown via a self-organized ordering process. From the UV photoemission/inverse photoemission spectroscopy (UPS/IPES) results, ab initio calculations and THz-TDS data, significant changes of the Fermi level and band gap were observed.

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Park J, Kim TH, Jeong K, Choi H, Jung S, Cho MH. Terahertz spectroscopy of topological insulator Sb₂Se₃ and its ultrafast nonequilibrium carrier dynamics. In 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016. IEEE Computer Society. 2016. 7758796. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz). https://doi.org/10.1109/IRMMW-THz.2016.7758796