Point symmetry of the yttrium-iron garnets

被引：0

作者：

Wojciechowski, RJ ^{[1
]}

Lehmann-Szweykowska, A ^{[1
]}

Lulek, T ^{[1
]}

Barnas, J ^{[1
]}

Wigen, PE ^{[1
]}

机构：

[1] Adam Mickiewicz Univ Poznan, Fac Phys, PL-61614 Poznan, Poland

来源：

SYMMETRY AND STRUCTURAL PROPERTIES OF CONDENSED MATTER | 2003年

关键词：

D O I：

10.1142/9789812704474_0034

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We investigate an influence of the point symmetry on the microscopic properties of a simple nanostructure consisting of two hybridising iron-oxygen octahedral and tetrahedral clusters. Within the framework of the standard three-band Hubbard model, energy levels with their eigen-states are found for the clusters. The eigen-states are labeled by the irreducible representations of the appropriate point symmetry groups. The results serve next as a point of departure both for estimating superexchange integrals between the clusters, and, also, for determining a microscopic origin of a strong magnetic anisotropy of the charge transfer between them.

引用

页码：393 / 405

页数：13

共 13 条

[1] Formation of localized hole states in complex oxides .1. Hole states in BaTiO3 [J].

Donnerberg, H ;

Tobben, S ;

Birkholz, A .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1997, 9 (30) :6359-6370

[2]

Griffith J. S., 1971, THEORY TRANSITION ME

[3] ELECTRON CORRELATIONS IN NARROW ENERGY BANDS [J].

HUBBARD, J .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1963, 276 (1364) :238-+

[4] Effective Hamiltonian in manganites: Study of the orbital and spin structures [J].

Ishihara, S ;

Inoue, J ;

Maekawa, S .

PHYSICAL REVIEW B, 1997, 55 (13) :8280-8286

[5] 4-BAND MODEL FOR OXYGEN HOLES IN COPPER-OXIDE SUPERCONDUCTORS .1. QUASI-PARTICLES [J].

KLEIN, L ;

AHARONY, A .

PHYSICAL REVIEW B, 1992, 45 (17) :9915-9925

[6] A space-symmetry approach to the p-d hybridization and direct p-p hopping in yttrium-iron garnets [J].

Lehmann-Szweykowska, A ;

Lulek, T ;

Kaczmarek, MM .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2001, 13 (15) :3607-3621

[7] The energy spectrum of single-hole states in transition metal oxides [J].

Lehmann-Szweykowska, A ;

Wojciechowski, RJ ;

Gehring, GA .

ACTA PHYSICA POLONICA A, 2000, 97 (03) :563-566

[8]

LEHMANNSZWEYKOW.A, 2002, MOL LOW DIMENSIONAL, V297

[9] ANTIFERROMAGNETISM AND CORRELATION OF ELECTRONS IN TRANSITION-METALS [J].

OLES, AM .

PHYSICAL REVIEW B, 1983, 28 (01) :327-339

[10] Tunnelling from Fe3O4 [J].

Srinitiwarawong, C ;

Gehring, GA .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2001, 13 (35) :7987-7998

← 1 2 →