利用 ARPES 研究 SrTiO3（001）表面 2D 电子气的载流子密度控制。
Carrier-Density Control of the SrTiO3 (001) Surface 2D Electron Gas studied by ARPES.
机构信息
Department of Quantum Matter Physics, University of Geneva, 24 Quai Ernest-Ansermet, 1211, Geneva, Switzerland.
Swiss Light Source, Paul Scherrer Institute, 5232, Villigen, Switzerland.
出版信息
Adv Mater. 2015 Jul 8;27(26):3894-9. doi: 10.1002/adma.201501556. Epub 2015 May 22.
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.
稳定在 SrTiO3（001）裸表面的二维电子气（2DEG）的起源。利用高分辨率角分辨光发射和芯能级谱学，明确表明这种 2DEG 源自光致氧空位。确定了驱动空位形成的主要机制，从而实现了对 2DEG 载流子密度的空前控制。
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