Un estudio teórico de la estructura electrónica y las propiedades dieléctricas de B-Nb2O5

ABSTRACT: In this work we have investigated theoretically the electronic and optical properties of niobium-oxide Nb2O5 for one of its crystalline phases, namely the B-phase. We have used Density Functional Theory along with the Generalized Gradient Approximation with one of its new modified function...

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Autores:
Valencia Balvín, Camilo
Pérez Walton, Santiago
Osorio Guillén, Jorge Mario
Tipo de recurso:
Article of investigation
Fecha de publicación:
2011
Institución:
Universidad de Antioquia
Repositorio:
Repositorio UdeA
Idioma:
spa
OAI Identifier:
oai:bibliotecadigital.udea.edu.co:10495/7991
Acceso en línea:
http://hdl.handle.net/10495/7991
Palabra clave:
DFT
Niobio
Óxidos
Propiedades electrónicas
Propiedades ópticas
Teoría del Funcional de la Densidad (DFT)
Rights
openAccess
License
Atribución-NoComercial-CompartirIgual (CC BY-NC-SA)
Description
Summary:ABSTRACT: In this work we have investigated theoretically the electronic and optical properties of niobium-oxide Nb2O5 for one of its crystalline phases, namely the B-phase. We have used Density Functional Theory along with the Generalized Gradient Approximation with one of its new modified functional targeted for solids: PBEsol. The calculated band gap is indirect (Eg=2,54 eV), with the valence band maximum located at and the conduction band minimum located at ( 1/3,1/3,1/3). We present also the calculated real and imaginary part of the dielectric tensor, the index of refraction, the reflectivity, the transmittance and the real part of the optical conductivity. The calculated value of the index of refraction is 2,52, which is in good agreement with the experimental value of 2,64.