Electronic structure of copper nitrides as a function of nitrogen content

Gordillo Garcia, Nuria and Gonzalez Arrabal, Raquel and Díaz Chao, Pablo and Ares Fernández, José Ramón and Jiménez Ferrer, Isabel and Ynduráin Muñoz, Félix and Agullo Lopez, Fernando (2013). Electronic structure of copper nitrides as a function of nitrogen content. "Thin Solid Films", v. 531 ; pp. 588-591. ISSN 0040-6090. https://doi.org/10.1016/j.tsf.2013.01.030.

Description

Title: Electronic structure of copper nitrides as a function of nitrogen content
Author/s:
  • Gordillo Garcia, Nuria
  • Gonzalez Arrabal, Raquel
  • Díaz Chao, Pablo
  • Ares Fernández, José Ramón
  • Jiménez Ferrer, Isabel
  • Ynduráin Muñoz, Félix
  • Agullo Lopez, Fernando
Item Type: Article
Título de Revista/Publicación: Thin Solid Films
Date: March 2013
ISSN: 0040-6090
Volume: 531
Subjects:
Freetext Keywords: Copper nitride; Electronic structure; Sebeeck coefficient; Density functional theory
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Nuclear [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

he nitrogen content dependence of the electronic properties for copper nitride thin films with an atomic percentage of nitrogen ranging from 26 ± 2 to 33 ± 2 have been studied by means of optical (spectroscopic ellipsometry), thermoelectric (Seebeck), and electrical resistivity measurements. The optical spectra are consistent with direct optical transitions corresponding to the stoichiometric semiconductor Cu3N plus a free-carrier contribution, essentially independent of temperature, which can be tuned in accordance with the N-excess. Deviation of the N content from stoichiometry drives to significant decreases from − 5 to − 50 μV/K in the Seebeck coefficient and to large enhancements, from 10− 3 up to 10 Ω cm, in the electrical resistivity. Band structure and density of states calculations have been carried out on the basis of the density functional theory to account for the experimental results.

More information

Item ID: 25689
DC Identifier: http://oa.upm.es/25689/
OAI Identifier: oai:oa.upm.es:25689
DOI: 10.1016/j.tsf.2013.01.030
Official URL: http://www.sciencedirect.com/science/article/pii/S0040609013001491
Deposited by: Memoria Investigacion
Deposited on: 05 May 2014 17:59
Last Modified: 01 Apr 2015 22:56
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