Electron correlations in Co2Mn1-xFexSi Heusler compounds

被引：45

作者：

Chadov, Stanislav ^{[1
]}

Fecher, Gerhard H. ^{[1
]}

Felser, Claudia ^{[1
]}

Minar, Jan ^{[2
]}

Braun, Juergen ^{[2
]}

Ebert, Hubert ^{[2
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Anorgan & Analyt Chem, D-55099 Mainz, Germany

[2] Univ Munich, Dept Chem & Biochem, D-81377 Munich, Germany

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2009年 / 42卷 / 08期

关键词：

ALLOYS;

D O I：

10.1088/0022-3727/42/8/084002

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This study presents the effect of local electronic correlations on the Heusler compounds Co2Mn1-xFex Si as a function of the concentration x. The analysis has been performed by means of first-principles band-structure calculations based on the local approximation to spin-density functional theory (LSDA). Correlation effects are treated in terms of the dynamical mean-field theory and the LSDA + U approach. The formalism is implemented within the Korringa-Kohn-Rostoker Green's function method. In good agreement with the available experimental data the magnetic and spectroscopic properties of the compound are explained in terms of strong electronic correlations. In addition, the correlation effects have been analysed separately with respect to their static or dynamical origin. To achieve a quantitative description of the electronic structure of Co2Mn1-xFex Si Si both static and dynamic correlations must be treated on an equal footing.

引用

页数：6

共 37 条

[1] FINAL-STATE RULE AND THE ABSORPTION-SPECTRA OF 3D FERROMAGNETS [J].

ALOUANI, M .

PHYSICAL REVIEW B, 1994, 49 (22) :16038-16041

[2] BAND THEORY AND MOTT INSULATORS - HUBBARD-U INSTEAD OF STONER-I [J].

ANISIMOV, VI ;

ZAANEN, J ;

ANDERSEN, OK .

PHYSICAL REVIEW B, 1991, 44 (03) :943-954

[3] Properties of the quaternary half-metal-type Heusler alloy Co2Mn1-xFexSi [J].

Balke, Benjamin ;

Fecher, Gerhard H. ;

Kandpal, Hem C. ;

Felser, Claudia ;

Kobayashi, Keisuke ;

Ikenaga, Eiji ;

Kim, Jung-Jin ;

Ueda, Shigenori .

PHYSICAL REVIEW B, 2006, 74 (10)

[4] Spectral function of ferromagnetic 3d metals:: A self-consistent LSDA+DMFT approach combined with the one-step model of photoemission [J].

Braun, J. ;

Minaer, J. ;

Ebert, H. ;

Katsnelson, M. I. ;

Lichtenstein, A. I. .

PHYSICAL REVIEW LETTERS, 2006, 97 (22)

[5] The magnetization distributions in some Heusler alloys proposed as half-metallic ferromagnets [J].

Brown, PJ ;

Neumann, KU ;

Webster, PJ ;

Ziebeck, KRA .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2000, 12 (08) :1827-1835

[6] THEORY OF ELECTRONIC TRANSPORT IN RANDOM ALLOYS - KORRINGA-KOHN-ROSTOKER COHERENT-POTENTIAL APPROXIMATION [J].

BUTLER, WH .

PHYSICAL REVIEW B, 1985, 31 (06) :3260-3277

[7] Influence of correlation effects on the magneto-optical properties of the half-metallic ferromagnet NiMnSb [J].

Chadov, S. ;

Minar, J. ;

Ebert, H. ;

Perlov, A. ;

Chioncel, L. ;

Katsnelson, M. I. ;

Lichtenstein, A. I. .

PHYSICAL REVIEW B, 2006, 74 (14)

[8] Orbital magnetism in transition metal systems:: The role of local correlation effects [J].

Chadov, S. ;

Minar, J. ;

Katsnelson, M. I. ;

Ebert, H. ;

Koedderitzsch, D. ;

Lichtenstein, A. I. .

EPL, 2008, 82 (03)

[9] Nonquasiparticle states in Co2MnSi evidenced through magnetic tunnel junction spectroscopy measurements [J].

Chioncel, L. ;

Sakuraba, Y. ;

Arrigoni, E. ;

Katsnelson, M. I. ;

Oogane, M. ;

Ando, Y. ;

Miyazaki, T. ;

Burzo, E. ;

Lichtenstein, A. I. .

PHYSICAL REVIEW LETTERS, 2008, 100 (08)

[10] LOCAL-DENSITY FUNCTIONAL AND ON-SITE CORRELATIONS - THE ELECTRONIC-STRUCTURE OF LA2CUO4 AND LACUO3 [J].

CZYZYK, MT ;

SAWATZKY, GA .

PHYSICAL REVIEW B, 1994, 49 (20) :14211-14228

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