Theoretical study of intrinsic defects in CdTe

E. Menéndez-Proupin, W. Orellana

Resultado de la investigación: Contribución a una revistaArtículo de la conferenciarevisión exhaustiva

5 Citas (Scopus)

Resumen

The quantum states and thermodynamical properties of the Cd and Te vacancies in CdTe are studied by first principles calculations. It is shown that the band structure of a cubic 64-atoms supercell with a Te vacancy is dramatically different from the band structure of the perfect crystal, suggesting that it cannot be used as model to calculate isolated defects. This flaw is solved modeling the Te vacancy within a cubic 216-atoms supercell. However, even with this large supercell, the 2 - charge state relaxes to an incorrect distorted structure. This distortion is driven by partial filling of the conduction band induced by the k-point sampling. The correct structures and formation energies are obtained by relaxation with restriction of system symmetry, followed by band-filling correction to the energy, or by using a larger supercell that allows sampling the Brillouin zone with a single k-point.

Idioma originalInglés
Número de artículo012031
PublicaciónJournal of Physics: Conference Series
Volumen720
N.º1
DOI
EstadoPublicada - 2016
Evento19th Chilean Physics Symposium 2014 - Concepcion, Chile
Duración: 26 nov 201428 nov 2014

Áreas temáticas de ASJC Scopus

  • Física y astronomía (todo)

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