通过控制氧空位实现 LaFeO/SrTiO 界面二维电子气的可逆形成。
Reversible Formation of 2D Electron Gas at the LaFeO /SrTiO Interface via Control of Oxygen Vacancies.
机构信息
IBM Research - Almaden, 650 Harry Road, San Jose, CA, 95120, USA.
Max Planck Institute for Microstructure Physics, Weinberg 2, 06120, Halle, Germany.
出版信息
Adv Mater. 2017 Mar;29(10). doi: 10.1002/adma.201604447. Epub 2017 Jan 16.
PMID:28092134
Abstract
A conducting 2D electron gas (2DEG) is formed at the interface between epitaxial LaFeO layers >3 unit cells thick and the surface of SrTiO single crystals. The 2DEG is exquisitely sensitive to cation intermixing and oxygen nonstoichiometry. It is shown that the latter thus allows the controllable formation of the 2DEG via ionic liquid gating, thereby forming a nonvolatile switch.
摘要
在外延 LaFeO 层（厚度>3 个单胞）和 SrTiO 单晶体表面之间形成了二维导电电子气（2DEG）。2DEG 对阳离子混合和氧非化学计量比非常敏感。结果表明，后者可以通过离子液体门控来控制 2DEG 的形成，从而形成非易失性开关。
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