Quantum confinement effects on Mn-doped InAs nanocrystals: A first-principles study
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
18/04/2012
18/04/2012
2008
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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 |
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 |