Highly anisotropic resistivities in the double-exchange model for strained manganites

被引：36

作者：

Dong, Shuai ^{[1
,2
]}

Yunoki, Seiji ^{[3
,4
]}

Zhang, Xiaotian ^{[5
,6
]}

Sen, Cengiz ^{[5
,6
]}

Liu, J. -M. ^{[2
,7
]}

Dagotto, Elbio ^{[5
,6
]}

机构：

[1] Southeast Univ, Dept Phys, Nanjing 211189, Peoples R China

[2] Nanjing Univ, Nanjing Natl Lab Microstruct, Nanjing 210093, Peoples R China

[3] RIKEN, Computat Condensed Matter Phys Lab, Wako, Saitama 3510198, Japan

[4] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan

[5] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[6] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 38231 USA

[7] Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 03期

基金：

美国国家科学基金会;

关键词：

JAHN-TELLER DISTORTION; MAGNETORESISTIVE MANGANITES; COLOSSAL MAGNETORESISTANCE; TETRAGONAL MANGANITES; DOPED MANGANITES; PHASE-SEPARATION; ELECTRONICS; TRANSITION; DIAGRAM;

D O I：

10.1103/PhysRevB.82.035118

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The highly anisotropic resistivities in strained manganites are theoretically studied using the two-orbital double-exchange model. At the nanoscale, the anisotropic double-exchange and Jahn-Teller distortions are found to be responsible for the robust anisotropic resistivities observed here via Monte Carlo simulations. An unbalance in the population of orbitals caused by strain is responsible for these effects. In contrast, the anisotropic superexchange is found to be irrelevant to explain our results. Our model study suggests that highly anisotropic resistivities could be present in a wide range of strained manganites, even without (sub)micrometer-scale phase separation. In addition, our calculations also confirm the formation of anisotropic clusters in phase-separated manganites, which magnifies the anisotropic resistivities.

引用

页数：6

共 52 条

[1] Strain-induced metal-insulator phase coexistence in perovskite manganites [J].

Ahn, KH ;

Lookman, T ;

Bishop, AR .

NATURE, 2004, 428 (6981) :401-404

[2] Theoretical study of half-doped models for manganites: Fragility of CE phase with disorder, two types of colossal magnetoresistance, and charge-ordered states for electron-doped materials [J].

Aliaga, H ;

Magnoux, D ;

Moreo, A ;

Poilblanc, D ;

Yunoki, S ;

Dagotto, E .

PHYSICAL REVIEW B, 2003, 68 (10)

[3] Evolution of the Jahn-Teller distortion of MnO6 octahedra in RMnO3 perovskites (R = Pr, Nd, Dy, Tb, Ho, Er, Y):: A neutron diffraction study [J].

Alonso, JA ;

Martínez-Lope, MJ ;

Casais, MT ;

Fernández-Díaz, MT .

INORGANIC CHEMISTRY, 2000, 39 (05) :917-923

[4] Current switching of resistive states in magnetoresistive manganites [J].

Asamitsu, A ;

Tomioka, Y ;

Kuwahara, H ;

Tokura, Y .

NATURE, 1997, 388 (6637) :50-52

[5] Relevance of cooperative lattice effects and stress fields in phase-separation theories for CMR manganites [J].

Burgy, J ;

Moreo, A ;

Dagotto, E .

PHYSICAL REVIEW LETTERS, 2004, 92 (09) :097202-1

[6] Surface electronic structure and magnetic properties of doped manganites [J].

Calderon, MJ ;

Brey, L ;

Guinea, F .

PHYSICAL REVIEW B, 1999, 60 (09) :6698-6704

[7] Nonmagnetic B-site impurity-induced ferromagnetic tendency in CE-type manganites [J].

Chen, Xiao ;

Dong, Shuai ;

Wang, Kefeng ;

Liu, J. -M. ;

Dagotto, Elbio .

PHYSICAL REVIEW B, 2009, 79 (02)

[8] Large anisotropy in colossal magnetoresistance of charge orbital ordered epitaxial Sm0.5Ca0.5MnO3 films [J].

Chen, Y. Z. ;

Sun, J. R. ;

Zhao, J. L. ;

Wang, J. ;

Shen, B. G. ;

Pryds, N. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2009, 21 (44)

[9] Complexity in strongly correlated electronic systems [J].

Dagotto, E .

SCIENCE, 2005, 309 (5732) :257-262

[10] Colossal magnetoresistant materials: The key role of phase separation [J].

Dagotto, E ;

Hotta, T ;

Moreo, A .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2001, 344 (1-3) :1-153

← 1 2 3 4 5 6 →