Carrier-Density Control of the SrTiO3 (001) Surface 2D Electron Gas studied by ARPES

被引：88

作者：

Walker, Siobhan McKeown ^{[1
]}

Bruno, Flavio Yair ^{[1
]}

Wang, Zhiming ^{[2
]}

de la Torre, Alberto ^{[1
]}

Ricco, Sara ^{[1
]}

Tamai, Anna ^{[1
]}

Kim, Timur K. ^{[3
]}

Hoesch, Moritz ^{[3
]}

Shi, Ming ^{[2
]}

Bahramy, Mohammad Saeed ^{[4
,5
]}

King, Phil D. C. ^{[6
]}

Baumberger, Felix ^{[1
,2
,6
]}

机构：

[1] Univ Geneva, Dept Quantum Matter Phys, CH-1211 Geneva, Switzerland

[2] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland

[3] Diamond Light Source, Didcot OX11 0DE, Oxon, England

[4] Univ Tokyo, Dept Appl Phys, Quantum Phase Elect Ctr, Tokyo 1138656, Japan

[5] RIKEN Ctr Emergent Matter Sci, Wako, Saitama 3510198, Japan

[6] Univ St Andrews, SUPA Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

来源：

ADVANCED MATERIALS | 2015年 / 27卷 / 26期

基金：

瑞士国家科学基金会; 英国工程与自然科学研究理事会;

关键词：

DESORPTION; INTERFACE;

D O I：

10.1002/adma.201501556

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The origin of the 2D electron gas (2DEG) stabilized at the bare surface of SrTiO3 (001) is investigated. Using high-resolution angle-resolved photoemission and core-level spectroscopy, it is shown conclusively that this 2DEG arises from light-induced oxygen vacancies. The dominant mechanism driving vacancy formation is identified, allowing unprecedented control over the 2DEG carrier density.

引用

页码：3894 / +

页数：7

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