Volume collapse in LaMnO3 studied using an anisotropic Potts model

被引：10

作者：

Ahmed, Mahrous R. ^{[1
,2
]}

Gehring, G. A. ^{[2
]}

机构：

[1] Sohag Univ, Dept Phys, Fac Sci, Sohag 82534, Egypt

[2] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 17期

关键词：

bond lengths; lanthanum compounds; Potts model; JAHN-TELLER TRANSITION; ANTIFERROMAGNETIC POTTS; LATTICE-DISTORTIONS; INTERPLAY;

D O I：

10.1103/PhysRevB.79.174106

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the volume collapse occurring in LaMnO3 unit cell using the anisotropic Potts model modified by two types of anisotropic interactions which has been used to study the behavior of the orbital-ordering configurations with temperature. The bond lengths are related to the occupation of the orbits. We have shown that the collapse is due to the change of Mn-O bonds as the temperature is raised through the transition. These results are in good agreement with the recently published experimental results.

引用

页数：5

共 30 条

[11]

Iida T., 1988, The Physical Properties of Liquid Metals

[12] 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

[13] CRYSTAL DISTORTION IN MAGNETIC COMPOUNDS [J].

KANAMORI, J .

JOURNAL OF APPLIED PHYSICS, 1960, 31 (05) :S14-S23

[14] Elastic interactions and superstructures in manganites and other Jahn-Teller systems [J].

Khomskii, DI ;

Kugel, KI .

PHYSICAL REVIEW B, 2003, 67 (13)

[15] Volume collapse in LaMnO3 at the Jahn-Teller transition temperature -: art. no. 132417 [J].

Maitra, T ;

Thalmeier, P ;

Chatterji, T .

PHYSICAL REVIEW B, 2004, 69 (13) :132417-1

[16] Orbital ordering in paramagnetic LaMnO3 and KCuF3 -: art. no. 172413 [J].

Medvedeva, JE ;

Korotin, MA ;

Anisimov, VI ;

Freeman, AJ .

PHYSICAL REVIEW B, 2002, 65 (17) :1724131-1724134

[17] Cooperative Jahn-Teller effect and electron-phonon coupling in La(1-x)A(x)MnO(3) [J].

Millis, AJ .

PHYSICAL REVIEW B, 1996, 53 (13) :8434-8441

[18] Interplay between orbital ordering and lattice distortions in LaMnO3, YVO3, and YTiO3 [J].

Mizokawa, T ;

Khomskii, DI ;

Sawatzky, GA .

PHYSICAL REVIEW B, 1999, 60 (10) :7309-7313

[19] Orbital ordering in LaMnO3:: Electron-electron and electron-lattice interactions -: art. no. 144403 [J].

Okamoto, S ;

Ishihara, S ;

Maekawa, S .

PHYSICAL REVIEW B, 2002, 65 (14) :1-8

[20]

Petrenko V. F., 2002, PHYS ICE

← 1 2 3 →