Theory of ferromagnetism in Ca1-xLaxB6

被引：15

作者：

Murakami, S ^{[1
]}

Shindou, R

Nagaosa, N

Mishchenko, AS

机构：

[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[2] Correlated Electron Res Ctr, Tsukuba, Ibaraki 3050046, Japan

[3] RRC Kurchatov Inst, Moscow 123182, Russia

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.88.126404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Novel ferromagnetism in Ca1-xLaxB6 is studied in terms of the Ginzburg-Landau theory for excitonic-order parameters, taking into account symmetry of the wave functions. We found that the minima of the free energy break both inversion and time-reversal symmetries, while the product of these two remains preserved. This explains various novelties of the ferromagnetism and predicts a number of magnetic properties, including the magnetoelectric effect, which can be tested experimentally.

引用

页数：4

共 30 条

[1] Ferromagnetism in doped excitonic insulators [J].

Balents, L ;

Varma, CM .

PHYSICAL REVIEW LETTERS, 2000, 84 (06) :1264-1267

[2]

BIRSS RR, 1964, SYMMETRY MAGNETISM, P136

[3] Condensed-matter physics - Return of the itinerant electron [J].

Ceperley, D .

NATURE, 1999, 397 (6718) :386-387

[4]

DENLINGER JD, CONDMAT0107429

[5]

DZYALOSHINSKII IE, 1960, SOV PHYS JETP-USSR, V10, P628

[6] A THERMODYNAMIC THEORY OF WEAK FERROMAGNETISM OF ANTIFERROMAGNETICS [J].

DZYALOSHINSKY, I .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1958, 4 (04) :241-255

[7] Anomalous NMR spin-lattice relaxation in SrB6 and Ca1-xLaxB6 -: art. no. 140410 [J].

Gavilano, JL ;

Mushkolaj, S ;

Rau, D ;

Ott, HR ;

Bianchi, A ;

Young, DP ;

Fisk, Z .

PHYSICAL REVIEW B, 2001, 63 (14)

[8] Fermi-surface measurements on the low-carrier density ferromagnet Ca1-xLaxB6 and SrB6 -: art. no. 233105 [J].

Hall, D ;

Young, DP ;

Fisk, Z ;

Murphy, TP ;

Palm, EC ;

Teklu, A ;

Goodrich, RG .

PHYSICAL REVIEW B, 2001, 64 (23)

[9]

Halperin B., 1968, SOLID STATE PHYS, V21, P115, DOI [10.1016/S0081-1947(08)60740-7, DOI 10.1016/S0081-1947(08)60740-7]

[10] ELECTRONIC-STRUCTURE OF CAB6 [J].

HASEGAWA, A ;

YANASE, A .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1979, 12 (24) :5431-5440

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