Quantum confinement effects on Mn-doped InAs nanocrystals: A first-principles study


Autoria(s): Arantes Junior, Jeverson Teodoro; Dalpian, Gustavo Martini; Fazzio, Adalberto
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

18/04/2012

18/04/2012

2008

Resumo

We studied the effect of quantum confinement in Mn-doped InAs nanocrystals using theoretical methods. We observe that the stability of the impurities decreases with the size of the nanocrystals, making doping more difficult in small nanoparticles. Substitutional impurities are always more stable than interstitial ones, independent of the size of the nanocrystal. There is also a decrease in the energy difference between the high and low spin configurations, indicating that the critical temperature should decrease with the size of the nanoparticles, in agreement with experimental observations and in detriment to the development of functional spintronic devices with doped nanocrystals. Codoping with acceptors or saturating the nanocrystals with molecules that insert partially empty levels in the energy gap should be an efficient way to increase T(C).

Identificador

PHYSICAL REVIEW B, v.78, n.4, 2008

1098-0121

http://producao.usp.br/handle/BDPI/16263

10.1103/PhysRevB.78.045402

http://dx.doi.org/10.1103/PhysRevB.78.045402

Idioma(s)

eng

Publicador

AMER PHYSICAL SOC

Relação

Physical Review B

Direitos

restrictedAccess

Copyright AMER PHYSICAL SOC

Palavras-Chave #AUGMENTED-WAVE METHOD #SEMICONDUCTOR NANOCRYSTALS #CDSE NANOCRYSTALS #DOTS #GROWTH #IMPURITIES #BINDING #(IN #Physics, Condensed Matter
Tipo

article

original article

publishedVersion