DocumentCode :
1769989
Title :
Terahertz dynamics of topological insulator Bi2Se3: Ultrafast photoexcitation suppresses hot-Dirac electron surface scattering
Author :
Sangwan Sim ; Brahlek, Matthew ; Koirala, Nikesh ; Soonyoung Cha ; Seongshik Oh ; Hyunyong Choi
Author_Institution :
Sch. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
fYear :
2014
fDate :
8-13 June 2014
Firstpage :
1
Lastpage :
2
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.
Keywords :
bismuth compounds; electric admittance; insulating thin films; photoexcitation; surface scattering; topological insulators; Bi2Se3; conductance; hot-Dirac electron surface scattering; photogenerated electrons; surface-scattering rate; topological insulator thin films; ultrafast photoexcitation; ultrafast terahertz scattering dynamics; Educational institutions; Optical pumping; Optical scattering; Spectroscopy; Topological insulators; Ultrafast optics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2014 Conference on
Conference_Location :
San Jose, CA
Type :
conf
Filename :
6988651
Link To Document :
https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=1769989
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