Atomic scale lattice distortions and domain wall profiles

被引：29

作者：

Ahn, KH ^{[1
]}

Lookman, T ^{[1
]}

Saxena, A ^{[1
]}

Bishop, AR ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.68.092101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present an atomic scale theory of lattice distortions using strain-related variables and their constraint equations. Our approach connects constrained atomic length scale variations to continuum elasticity and describes elasticity at several length scales. We apply the approach to a two-dimensional square lattice with a monatomic basis and find the elastic deformations and hierarchical atomic relaxations in the vicinity of a domain wall between two different homogeneous strain states. We clarify the microscopic origin of gradient terms, some of which are included phenomenologically in Ginzburg-Landau theory, by showing that they are anisotropic.

引用

页数：4

共 14 条

[1] TWIN BOUNDARIES IN FERROELASTIC MEDIA WITHOUT INTERFACE DISLOCATIONS [J].

BARSCH, GR ;

KRUMHANSL, JA .

PHYSICAL REVIEW LETTERS, 1984, 53 (11) :1069-1072

[2] Temperature dependence of the domain wall width in LaAlO3 [J].

Chrosch, J ;

Salje, EKH .

JOURNAL OF APPLIED PHYSICS, 1999, 85 (02) :722-727

[3] On the microscopic foundations of elasticity [J].

Goldhirsch, I ;

Goldenberg, C .

EUROPEAN PHYSICAL JOURNAL E, 2002, 9 (03) :245-251

[4] Elastic properties of C and BxCyNz composite nanotubes [J].

Hernandez, E ;

Goze, C ;

Bernier, P ;

Rubio, A .

PHYSICAL REVIEW LETTERS, 1998, 80 (20) :4502-4505

[5]

KITTEL C, 1960, INTRODUCTION SOLID S, P96

[6] Ferroelastic dynamics and strain compatibility [J].

Lookman, T ;

Shenoy, SR ;

Rasmussen, KO ;

Saxena, A ;

Bishop, AR .

PHYSICAL REVIEW B, 2003, 67 (02)

[7] Elastic properties of carbon nanotubes and nanoropes [J].

Lu, JP .

PHYSICAL REVIEW LETTERS, 1997, 79 (07) :1297-1300

[8] 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

[9]

Nabarro F R N, 1967, THEORY CRYSTAL DISLO

[10] Charge, orbital, and magnetic ordering in La0.5Ca0.5MnO3 [J].

Radaelli, PG ;

Cox, DE ;

Marezio, M ;

Cheong, SW .

PHYSICAL REVIEW B, 1997, 55 (05) :3015-3023

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