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

[31] Combined effect of bond and potential disorder in half-doped manganites [J].

Kumar, Sanjeev ;

Kampf, Arno P. .

PHYSICAL REVIEW LETTERS, 2008, 100 (07)

[32] Peculiar physical properties and the colossal magnetoresistance of manganites (Review) [J].

Loktev, VM ;

Pogorelov, YG .

LOW TEMPERATURE PHYSICS, 2000, 26 (03) :171-193

[33] Oxide Interfaces-An Opportunity for Electronics [J].

Mannhart, J. ;

Schlom, D. G. .

SCIENCE, 2010, 327 (5973) :1607-1611

[34] Resistivity of mixed-phase manganites [J].

Mayr, M ;

Moreo, A ;

Vergés, JA ;

Arispe, J ;

Feiguin, A ;

Dagotto, E .

PHYSICAL REVIEW LETTERS, 2001, 86 (01) :135-138

[35] Competing orders and disorder-induced insulator to metal transition in manganites [J].

Motome, Y ;

Furukawa, N ;

Nagaosa, N .

PHYSICAL REVIEW LETTERS, 2003, 91 (16) :167204-167204

[36] Effects of strain on orbital ordering and magnetism at perovskite oxide interfaces:: LaMnO3/SrMnO3 [J].

Nanda, B. R. K. ;

Satpathy, Sashi .

PHYSICAL REVIEW B, 2008, 78 (05)

[37] Distinct effects of homogeneous weak disorder and dilute strong scatterers on phase competition in manganites [J].

Pradhan, Kalpataru ;

Mukherjee, Anamitra ;

Majumdar, Pinaki .

PHYSICAL REVIEW LETTERS, 2007, 99 (14)

[38] Magnetoresistance of an all-manganite spin valve:: A thin antiferromagnetic insulator sandwiched between two ferromagnetic metallic electrodes [J].

Salafranca, J. ;

Calderon, M. J. ;

Brey, L. .

PHYSICAL REVIEW B, 2008, 77 (01)

[39] Jahn-Teller distortion and magnetic structures in LaMnO3 [J].

Sawada, H ;

Morikawa, Y ;

Terakura, K ;

Hamada, N .

PHYSICAL REVIEW B, 1997, 56 (19) :12154-12160

[40] Insulator-to-metal transition induced by disorder in a model for manganites [J].

Sen, C ;

Alvarez, G ;

Dagotto, E .

PHYSICAL REVIEW B, 2004, 70 (06) :064428-1

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