Design Rules to Achieve High-Tc Ferromagnetism in (Ga,Mn)As Alloys

A. Franceschetti; A. Zunger; M. Van Schilfgaarde

doi:10.1088/0953-8984/19/24/242203

Design Rules to Achieve High-Tc Ferromagnetism in (Ga,Mn)As Alloys

A. Franceschetti, A. Zunger, M. Van Schilfgaarde

Research output: Contribution to journal › Article › peer-review

10 Scopus Citations

Abstract

The Curie temperature T_C of ferromagnetic semiconductor alloys depends not only on the alloy composition, but also on the spatial configuration of the magnetic impurities. Here we use a set of first-principle-calculated Curie temperatures to uncover - via a statistical, 'data mining' approach - the rules that govern the dependence of T_C on the configuration of Mn substitutional impurities in GaAs. We find that T_C is lowered (raised) when the average number of first (third and fourth) nearest-neighbour Mn pairs increases, suggesting simple atom-by-atom strategies to achieve high T_C in (Ga, Mn)As alloys.

Original language	American English
Article number	242203
Number of pages	7
Journal	Journal of Physics Condensed Matter
Volume	19
Issue number	24
DOIs	https://doi.org/10.1088/0953-8984/19/24/242203 https://doi.org/10.1088/0953-8984/19/24/242203
State	Published - 20 Jun 2007
Externally published	Yes

NREL Publication Number

NREL/JA-590-41657

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title = "Design Rules to Achieve High-Tc Ferromagnetism in (Ga,Mn)As Alloys",

abstract = "The Curie temperature TC of ferromagnetic semiconductor alloys depends not only on the alloy composition, but also on the spatial configuration of the magnetic impurities. Here we use a set of first-principle-calculated Curie temperatures to uncover - via a statistical, 'data mining' approach - the rules that govern the dependence of TC on the configuration of Mn substitutional impurities in GaAs. We find that TC is lowered (raised) when the average number of first (third and fourth) nearest-neighbour Mn pairs increases, suggesting simple atom-by-atom strategies to achieve high TC in (Ga, Mn)As alloys.",

author = "A. Franceschetti and A. Zunger and {Van Schilfgaarde}, M.",

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AU - Franceschetti, A.

AU - Zunger, A.

AU - Van Schilfgaarde, M.

PY - 2007/6/20

Y1 - 2007/6/20

N2 - The Curie temperature TC of ferromagnetic semiconductor alloys depends not only on the alloy composition, but also on the spatial configuration of the magnetic impurities. Here we use a set of first-principle-calculated Curie temperatures to uncover - via a statistical, 'data mining' approach - the rules that govern the dependence of TC on the configuration of Mn substitutional impurities in GaAs. We find that TC is lowered (raised) when the average number of first (third and fourth) nearest-neighbour Mn pairs increases, suggesting simple atom-by-atom strategies to achieve high TC in (Ga, Mn)As alloys.

AB - The Curie temperature TC of ferromagnetic semiconductor alloys depends not only on the alloy composition, but also on the spatial configuration of the magnetic impurities. Here we use a set of first-principle-calculated Curie temperatures to uncover - via a statistical, 'data mining' approach - the rules that govern the dependence of TC on the configuration of Mn substitutional impurities in GaAs. We find that TC is lowered (raised) when the average number of first (third and fourth) nearest-neighbour Mn pairs increases, suggesting simple atom-by-atom strategies to achieve high TC in (Ga, Mn)As alloys.

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U2 - 10.1088/0953-8984/19/24/242203

DO - 10.1088/0953-8984/19/24/242203

M3 - Article

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VL - 19

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

IS - 24

M1 - 242203

ER -

Design Rules to Achieve High-Tc Ferromagnetism in (Ga,Mn)As Alloys

Abstract

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