Large nanoscale electronic conductivity in complex oxide heterostructures with ultra high electron density

被引：4

作者：

Arezoomandan, Sara ^{[1
]}

Quispe, Hugo Condori ^{[1
]}

Chanana, Ashish ^{[1
]}

Xu, Peng ^{[2
]}

Nahata, Ajay ^{[1
]}

Jalan, Bharat ^{[2
]}

Sensale-Rodriguez, Berardi ^{[1
]}

机构：

[1] Univ Utah, Dept Elect & Comp Engn, Salt Lake City, UT 84112 USA

[2] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA

来源：

APL MATERIALS | 2016年 / 4卷 / 07期

基金：

美国国家科学基金会;

关键词：

TERAHERTZ SPECTROSCOPY; INTERFACE; SUPERCONDUCTIVITY; GRAPHENE; FERROMAGNETISM; CHARGE; FIELD; GAS;

D O I：

10.1063/1.4959284

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We study the two-dimensional electron gas at the interface of NdTiO3 and SrTiO3 to reveal its nanoscale transport properties. At electron densities approaching 10(15) cm(-2), our terahertz spectroscopy data show conductivity levels that are up to six times larger than those extracted from DC electrical measurements. Moreover, the largest conductivity enhancements are observed in samples intentionally grown with larger defect densities. This is a signature of electron transport over the characteristic length-scales typically probed by electrical measurements being significantly affected by scattering by structural defects introduced during growth, and, a trait of a much larger electron mobility at the nanoscale. (C) 2016 Author(s).

引用

页数：8

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