A circular photogalvanic effect in two-dimensional electron gas on the surface of SrTiO3

被引：2

作者：

Yamamoto, Mahiro ^{[1
]}

Nishijima, Taiki ^{[1
]}

Ohshima, Ryo ^{[1
,2
]}

Ando, Yuichiro ^{[1
,2
,3
]}

Shiraishi, Masashi ^{[1
,2
]}

机构：

[1] Kyoto Univ, Dept Elect Sci & Engn, Kyoto 6158510, Japan

[2] Kyoto Univ, CSRN, Kyoto 6158510, Japan

[3] Japan Sci & Technol Agcy, PRESTO, Saitama 3320012, Japan

来源：

APPLIED PHYSICS LETTERS | 2024年 / 124卷 / 08期

基金：

日本科学技术振兴机构; 日本学术振兴会;

关键词：

SPIN-ORBIT INTERACTION; ROOM-TEMPERATURE; INSULATOR; PHOTOCURRENTS; CONVERSION; STATE;

D O I：

10.1063/5.0190118

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A spin-splitting state due to a Rashba-type spin-orbit interaction is investigated using two-dimensional electron gas (2DEG) at the surface of SrTiO3. The circular photogalvanic effect is utilized to detect the spin-splitting state. Both the polarization and incident light angle dependence of the measured photocurrent generated in the 2DEG unequivocally show the presence of surface spin splitting in the 2DEG, and variation of the carrier densities of the 2DEG provides further supporting evidence. This finding could pave the way for investigating spin textures and spin physics in two-dimensional carrier gas systems.

引用

页数：5

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