Orbital polarization in manganese oxides

被引：131

作者：

Maezono, R ^{[1
]}

Ishihara, S ^{[1
]}

Nagaosa, N ^{[1
]}

机构：

[1] Univ Tokyo, Dept Appl Phys, Tokyo 113, Japan

来源：

PHYSICAL REVIEW B | 1998年 / 57卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.57.R13993

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the role of orbital degrees of freedom in perovskite manganites, which are well known as colossal-magnetoresistance (CMR) compounds. The double degeneracy of the e(g) orbitals is treated with isospin. Orbital polarization is essential to explain the variety of phases in these compounds and their physical properties. Especially important is the fact that the orbital is aligned as d(x2-y2) in the metallic layered antiferromagnetic state, which explains the experimentally observed quasi-two-dimensional transport and absence of spin canting. A large orbital fluctuation in the ferromagnetic state is also predicted.

引用

收藏

页码：13993 / 13996

页数：4

相关论文

共 25 条

[1] Antiferromagnetic metallic state in doped manganites [J].

Akimoto, T ;

Maruyama, Y ;

Moritomo, Y ;

Nakamura, A ;

Hirota, K ;

Ohoyama, K ;

Ohashi, M .

PHYSICAL REVIEW B, 1998, 57 (10) :R5594-R5597

[2] CONSIDERATIONS ON DOUBLE EXCHANGE [J].

ANDERSON, PW ;

HASEGAWA, H .

PHYSICAL REVIEW, 1955, 100 (02) :675-681

[3] THE RESONATING VALENCE BOND STATE IN LA2CUO4 AND SUPERCONDUCTIVITY [J].

ANDERSON, PW .

SCIENCE, 1987, 235 (4793) :1196-1198

[4] Impact of charge ordering on magnetic correlations in perovskite (Bi,Ca)MnO3 [J].

Bao, W ;

Axe, JD ;

Chen, CH ;

Cheong, SW .

PHYSICAL REVIEW LETTERS, 1997, 78 (03) :543-546

[5] MAGNETORESISTANCE IN MAGNETIC MANGANESE OXIDE WITH INTRINSIC ANTIFERROMAGNETIC SPIN STRUCTURE [J].

CHAHARA, K ;

OHNO, T ;

KASAI, M ;

KOZONO, Y .

APPLIED PHYSICS LETTERS, 1993, 63 (14) :1990-1992

[6] EFFECTS OF DOUBLE EXCHANGE IN MAGNETIC CRYSTALS [J].

DEGENNES, PG .

PHYSICAL REVIEW, 1960, 118 (01) :141-154

[7] TRANSPORT-PROPERTIES OF THE KONDO-LATTICE MODEL IN THE LIMIT S=INFINITY AND D=INFINITY [J].

FURUKAWA, N .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1994, 63 (09) :3214-3217

[8] THEORY OF THE ROLE OF COVALENCE IN THE PEROVSKITE-TYPE MANGANITES [LA,M(II)]MNO3 [J].

GOODENOUGH, JB .

PHYSICAL REVIEW, 1955, 100 (02) :564-573

[9] LATTICE EFFECTS ON THE MAGNETORESISTANCE IN DOPED LAMNO3 [J].

HWANG, HY ;

CHEONG, SW ;

RADAELLI, PG ;

MAREZIO, M ;

BATLOGG, B .

PHYSICAL REVIEW LETTERS, 1995, 75 (05) :914-917

[10] Orbital liquid in perovskite transition-metal oxides [J].

Ishihara, S ;

Yamanaka, M ;

Nagaosa, N .

PHYSICAL REVIEW B, 1997, 56 (02) :686-692