The electronic structure of Ga-vacancy in Mn-doped GaN

J. Kang; K. J. Chang

doi:10.1002/pssc.200779180

The electronic structure of Ga-vacancy in Mn-doped GaN

J. Kang, K. J. Chang

Department of Physics and Chemistry

Korea Advanced Institute of Science and Technology

Research output: Contribution to journal › Conference article › peer-review

Abstract

Using first-principles theoretical calculations, we find that Ga-vacancies (V_Ga) strongly interact with the Mn ions in GaN and thereby significantly affect the electronic and magnetic properties. When Ga-vacancies are present in the neighbourhood of the Mn ions, a charge transfer occurs from the Mn d band to the acceptor level of V_Ga. Due to the depopulation of the Mn d band, the Fermi level is generally lowered, and ferromagnetic exchange interactions between the Mn ions are weakened, reducing the Curie temperature.

Original language	English
Pages (from-to)	3035-3037
Number of pages	3
Journal	Physica Status Solidi (C) Current Topics in Solid State Physics
Volume	5
Issue number	9
DOIs	https://doi.org/10.1002/pssc.200779180
State	Published - 2008
Event	34th International Symposium on Compound Semiconductors, ISCS-2007 - Kyoto, Japan Duration: 15 Oct 2007 → 18 Oct 2007

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abstract = "Using first-principles theoretical calculations, we find that Ga-vacancies (VGa) strongly interact with the Mn ions in GaN and thereby significantly affect the electronic and magnetic properties. When Ga-vacancies are present in the neighbourhood of the Mn ions, a charge transfer occurs from the Mn d band to the acceptor level of VGa. Due to the depopulation of the Mn d band, the Fermi level is generally lowered, and ferromagnetic exchange interactions between the Mn ions are weakened, reducing the Curie temperature.",

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AB - Using first-principles theoretical calculations, we find that Ga-vacancies (VGa) strongly interact with the Mn ions in GaN and thereby significantly affect the electronic and magnetic properties. When Ga-vacancies are present in the neighbourhood of the Mn ions, a charge transfer occurs from the Mn d band to the acceptor level of VGa. Due to the depopulation of the Mn d band, the Fermi level is generally lowered, and ferromagnetic exchange interactions between the Mn ions are weakened, reducing the Curie temperature.

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M3 - Conference article

AN - SCOPUS:77951291218

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JO - Physica Status Solidi (C) Current Topics in Solid State Physics

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Y2 - 15 October 2007 through 18 October 2007

ER -

The electronic structure of Ga-vacancy in Mn-doped GaN

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