ELECTRODEPOSITED DEFECT CHEMISTRY SUPERLATTICES

被引：84

作者：

SWITZER, JA ^{[1
]}

HUNG, CJ ^{[1
]}

BREYFOGLE, BE ^{[1
]}

SHUMSKY, MG ^{[1
]}

VANLEEUWEN, R ^{[1
]}

GOLDEN, TD ^{[1
]}

机构：

[1] UNIV MISSOURI,GRAD CTR MAT RES,ROLLA,MO 65401

来源：

SCIENCE | 1994年 / 264卷 / 5165期

关键词：

D O I：

10.1126/science.264.5165.1573

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Nanometer-scale layered structures based on thallium(III) oxide were electrodeposited in a beaker at room temperature by pulsing the applied potential during deposition. The conducting metal oxide samples were superlattices, with layers as thin as 6.7 nanometers. The defect chemistry was a function of the applied overpotential: High overpotentials favored oxygen vacancies, whereas low overpotentials favored cation interstitials. The transition from one defect chemistry to another in this nonequilibrium process occurred in the same potential range (100 to 120 millivolts) in which the rate of the back electron transfer reaction became significant. The epitaxial structures have the high carrier density and low electronic dimensionality of high transition temperature superconductors.

引用

页码：1573 / 1576

页数：4

共 28 条

[21] ELECTRICAL-CONDUCTION IN SINGLE-CRYSTAL THALLIC OXIDE .1. CRYSTALS AS-GROWN FROM VAPOR IN AIR [J].