Mean-field approach to disorder effects on ferromagnetism in Ga1-xMnxAs

Mona Berciu; R. N. Bhatt

doi:10.1016/S0921-4526(01)01209-1

Mean-field approach to disorder effects on ferromagnetism in Ga_1-xMn_xAs

Mona Berciu, R. N. Bhatt

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

14 Scopus citations

Abstract

Using a numerical mean field treatment, we examine the onset of ferromagnetism and the nature of the ferromagnetic phase in Ga_1-xMn_xAs for charge carrier densities in the vicinity of the metal-insulator transition. Our approach, which explicitly takes into account the positional disorder of the Mn ions, shows that the ferromagnetic transition temperature is significantly enhanced by the disorder. Concurrently, a very unusual temperature dependence of the magnetization is obtained in the ferromagnetic phase.

Original language	English (US)
Pages (from-to)	815-817
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	312-313
DOIs	https://doi.org/10.1016/S0921-4526(01)01209-1
State	Published - Mar 2002
Event	International Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States Duration: Aug 6 2002 → Aug 6 2002

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Keywords

Diluted magnetic semiconductors
Ferromagnetism

Access to Document

10.1016/S0921-4526(01)01209-1

Cite this

@article{b293300f2d8a4314a2db7bacfb4956ba,

title = "Mean-field approach to disorder effects on ferromagnetism in Ga1-xMnxAs",

abstract = "Using a numerical mean field treatment, we examine the onset of ferromagnetism and the nature of the ferromagnetic phase in Ga1-xMnxAs for charge carrier densities in the vicinity of the metal-insulator transition. Our approach, which explicitly takes into account the positional disorder of the Mn ions, shows that the ferromagnetic transition temperature is significantly enhanced by the disorder. Concurrently, a very unusual temperature dependence of the magnetization is obtained in the ferromagnetic phase.",

keywords = "Diluted magnetic semiconductors, Ferromagnetism",

author = "Mona Berciu and Bhatt, {R. N.}",

note = "Funding Information: M.B. acknowledges a Postdoctoral Fellowship from NSERC. This project was supported by NSF DMR-9809483.; International Conference on Strongly Correlated Electrons ; Conference date: 06-08-2002 Through 06-08-2002",

year = "2002",

month = mar,

doi = "10.1016/S0921-4526(01)01209-1",

language = "English (US)",

volume = "312-313",

pages = "815--817",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

}

TY - JOUR

T1 - Mean-field approach to disorder effects on ferromagnetism in Ga1-xMnxAs

AU - Berciu, Mona

AU - Bhatt, R. N.

N1 - Funding Information: M.B. acknowledges a Postdoctoral Fellowship from NSERC. This project was supported by NSF DMR-9809483.

PY - 2002/3

Y1 - 2002/3

N2 - Using a numerical mean field treatment, we examine the onset of ferromagnetism and the nature of the ferromagnetic phase in Ga1-xMnxAs for charge carrier densities in the vicinity of the metal-insulator transition. Our approach, which explicitly takes into account the positional disorder of the Mn ions, shows that the ferromagnetic transition temperature is significantly enhanced by the disorder. Concurrently, a very unusual temperature dependence of the magnetization is obtained in the ferromagnetic phase.

AB - Using a numerical mean field treatment, we examine the onset of ferromagnetism and the nature of the ferromagnetic phase in Ga1-xMnxAs for charge carrier densities in the vicinity of the metal-insulator transition. Our approach, which explicitly takes into account the positional disorder of the Mn ions, shows that the ferromagnetic transition temperature is significantly enhanced by the disorder. Concurrently, a very unusual temperature dependence of the magnetization is obtained in the ferromagnetic phase.

KW - Diluted magnetic semiconductors

KW - Ferromagnetism

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U2 - 10.1016/S0921-4526(01)01209-1

DO - 10.1016/S0921-4526(01)01209-1

M3 - Conference article

AN - SCOPUS:0036504224

SN - 0921-4526

VL - 312-313

SP - 815

EP - 817

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

T2 - International Conference on Strongly Correlated Electrons

Y2 - 6 August 2002 through 6 August 2002

ER -