Nonlinear pressure dependence of the direct band gap in adamantineordered-vacancy compounds

F. J. Manjon; 0. Gomis; R Rodriguez-Hernandez

首页> 外文期刊>Physical review, B. Condensed matter and materials physics >Nonlinear pressure dependence of the direct band gap in adamantineordered-vacancy compounds

【24h】

Nonlinear pressure dependence of the direct band gap in adamantineordered-vacancy compounds

机译：

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

A strong nonlinear pressure dependence of the optical absorption edge has been measured in defect chal-copyrites CdGa_2Se_4 and HgGa_2Se_4. The behavior is due to the nonlinear pressure dependence of the direct band-gap energy in these compounds as confirmed by ab initio calculations. Our calculations for CdGa_2Se_4, HgGa_2Se_4 and monoclinic β-Ga_2Se_3 provide evidence that the nonlinear pressure dependence of the direct band-gap energy is a general feature of adamantine ordered-vacancy compounds irrespective of their composition and crystalline structure. The nonlinear behavior is due to a conduction band anticrossing at the 1 point of the Brillouin zone caused by the presence of ordered vacancies in the unit cell of these tetrahedrally coordinated compounds.

著录项

来源
《Physical review, B. Condensed matter and materials physics》 |2010年第19期|195201:1-195201:3|共3页
作者
F. J. Manjon; 0. Gomis; R Rodriguez-Hernandez;
展开▼
作者单位

Instituto de Diseno para la Fabricacion y Produccion Automatizada, MALTA Consolider Team,Universidad Politecnica de Valencia, 46022 Valencia, Spain;

Centro de Tecnologias Fisicas: Acdstica, Materiales y Astrofisica, MALTA Consolider Team,Universidad Politecnica de Valencia, 46022 Valencia, Spain;

Departamento de Fisica Fundamental II, Mstituto de Materiales Nanotecnologia, MALTA Consolider Team,Universidad de La Laguna, 38205 Tenerife, Spain;

展开▼
收录信息
原文格式 PDF
正文语种英语
中图分类物理学;
关键词
Nonlinear; pressure; dependence;

Nonlinear pressure dependence of the direct band gap in adamantineordered-vacancy compounds

摘要

著录项

相关主题

期刊订阅