Electrical conductivity and Meyer-Neldel rule: The role of localized states in hydrogenated amorphous silicon

被引：37

作者：

Abtew, T. A. ^{[1
,2
]}

Zhang, MingLiang ^{[1
]}

Pan, Yue ^{[1
]}

Drabold, D. A. ^{[1
]}

机构：

[1] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA

[2] N Carolina State Univ, Ctr High Performance Simulat, Dept Phys, Raleigh, NC 27695 USA

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2008年 / 354卷 / 19-25期

基金：

美国国家科学基金会;

关键词：

silicon; conductivity;

D O I：

10.1016/j.jnoncrysol.2007.09.103

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The Meyer-Neldel rule (MNR) has been observed in recent calculations of the electrical conductivity of hydrogenated amorphous silicon. To elucidate the origin of this effect, we have performed comparative studies on crystalline Si and non-hydrogenated a-Si. We find that the MNR is not present in the crystal, and is present in a-Si. This suggests that the existence of localized states and the energy dependence of the electron-lattice coupling for these states is an essential feature of the MNR for amorphous phases of silicon. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：2909 / 2913

页数：5