Enhanced Photovoltage on the Surface of Topological Insulator via Optical Aging | Sciact - CRIS-system of Boreskov Institute of Catalysis

Enhanced Photovoltage on the Surface of Topological Insulator via Optical Aging Full article

Journal

Applied Physics Letters
ISSN: 0003-6951 , E-ISSN: 1077-3118

Output data

Year: 2018, Volume: 112, Number: 19, Article number : 192104, Pages count : 5 DOI: 10.1063/1.5008466

Tags

Bismuth compounds; Energy efficiency; Photoelectron spectroscopy; Photovoltaic effects; Spin polarization; Tellurium compounds

Authors

Yoshikawa Tomoki ¹ , Ishida Yukiaki ² , Sumida Kazuki ¹ , Chen Jiahua ¹ , Kokh Konstantin A. ^3,4 , Tereshchenko Oleg E. ^4,5 , Shin Shik ² , Kimura Akio ¹

Affiliations

1	Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
2	Institute for Solid State Physics, The University of Tokyo, 5-1-5, Kashiwa-no-ha, Chiba 277-8581, Japan
3	Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Koptyuga pr. 3,
4	Novosibirsk State University, ul. Pirogova 2, 630090 Novosibirsk, Russia
5	Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, pr. Akademika

The efficient generation of spin-polarized current is one of the keys to realizing spintronic devices with a low power consumption. Topological insulators are strong candidates for this purpose. A surface photovoltaic effect can be utilized on the surface of a topological insulator, where a surface spin-polarized current can flow upon illumination. Here, we used time- and angle-resolved photoelectron spectroscopy on the surface of Bi2Te3 to demonstrate that the magnitude of the surface photovoltage is almost doubled in optically aged samples, i.e., samples whose surface has been exposed to intense infrared light illumination. Our findings pave the way for optical control of the spin-polarized current by utilizing topological insulators.

Yoshikawa T. , Ishida Y. , Sumida K. , Chen J. , Kokh K.A. , Tereshchenko O.E. , Shin S. , Kimura A.
Enhanced Photovoltage on the Surface of Topological Insulator via Optical Aging
Applied Physics Letters. 2018. V.112. N19. 192104 :1-5. DOI: 10.1063/1.5008466 WOS Scopus ANCAN OpenAlex

Submitted:	Oct 6, 2017
Accepted:	Apr 25, 2018
Published online:	May 9, 2018

Web of science:	WOS:000431980100017
Scopus:	2-s2.0-85046904191
Chemical Abstracts:	2018:932489
Chemical Abstracts (print):	169:22338
OpenAlex:	W2802055122

DB	Citing
Scopus	12
OpenAlex	14
Web of science	12