Open Access System for Information Sharing

Login Library

 

Article
Cited 11 time in webofscience Cited 11 time in scopus
Metadata Downloads

Difference in electronic structure between tetragonal and cubic SrNbO2N SCIE SCOPUS

Title
Difference in electronic structure between tetragonal and cubic SrNbO2N
Authors
Borse, PHKim, HGLee, JS
Date Issued
2005-08-15
Publisher
AMER INST PHYSICS
Abstract
We report here a comparative study of the electronic structure of earlier known cubic phase and the recently, reported correct tetragonal phase of SrNbO2N. We performed the calculations within the framework of density-functional theory (DFT) by using the WIEN97 code. The valence band consists of N 2p while the conduction band consists of Nb 4d in cubic system; on the contrary, these Nb 4d states show a strong interaction with anion p states in tetragonal system and indicate theoretically, a metallic behavior. The direct forbidden gap of tetragonal system was 0 eV, whereas for cubic system was 0.2 eV; the relative difference in the band gap of two systems is possibly attributed to the high covalency and is possibly acquired due to the presence of the shorter bond length of Nb - N than that of Nb-O in the tetragonal system. The results of electronic structures have been discussed in the light of optical applications of this oxynitride in solar energy conversion. The calculated optical-absorption coefficient I(w) from real and imaginary parts of dielectric function, further clarifies the suitability of the application. (c) 2005 American Institute of Physics.
URI
https://oasis.postech.ac.kr/handle/2014.oak/10561
DOI
10.1063/1.2032612
ISSN
0021-8979
Article Type
Article
Citation
JOURNAL OF APPLIED PHYSICS, vol. 98, no. 4, 2005-08-15
Files in This Item:

qr_code

  • mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Views & Downloads

Browse