Two-Dimensional Polaronic Behavior in the Binary Oxides m-HfO2 and m-ZrO2

被引：58

作者：

McKenna, Keith P. ^{[1
,2
]}

Wolf, Matthew J. ^{[3
]}

Shluger, Alexander L. ^{[2
,3
]}

Lany, Stephan ^{[4
]}

Zunger, Alex ^{[5
]}

机构：

[1] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

[2] Tohoku Univ, WPI AIMR, Aoba Ku, Sendai, Miyagi 9808577, Japan

[3] UCL, Dept Phys & Astron, London WC1E 6BT, England

[4] Natl Renewable Energy Lab, Golden, CO 80401 USA

[5] Univ Colorado, Boulder, CO 80309 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

ELECTRICAL-PROPERTIES; FEMTOSECOND DYNAMICS; DEFECT STRUCTURE; ELECTRONS; MOTION; HOLES;

D O I：

10.1103/PhysRevLett.108.116403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate that the three-dimensional (3D) binary monoclinic oxides HfO2 and ZrO2 exhibit quasi-2D polaron localization and conductivity, which results from a small difference in the coordination of two oxygen sublattices in these materials. The transition between a 2D large polaron into a zero-dimensional small polaron state requires overcoming a small energetic barrier. These results demonstrate how a small asymmetry in the lattice structure can determine the qualitative character of polaron localization and significantly broaden the realm of quasi-2D polaron systems.

引用

页数：5

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