Understanding the insulating phase in colossal magnetoresistance manganites:: Shortening of the Jahn-Teller long-bond across the phase diagram of La1-xCaxMnO3

被引：60

作者：

Bozin, E. S. ^{[1
]}

Schmidt, M.

DeConinck, A. J.

Paglia, G.

Mitchell, J. F.

Chatterji, T.

Radaelli, P. G.

Proffen, Th.

Billinge, S. J. L.

机构：

[1] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[2] Rutherford Appleton Lab, CCLRC, ISIS, Didcot OX11 0QX, Oxon, England

[3] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[4] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

[5] Los Alamos Natl Lab, Manuel Lujan Jr Neutron Scattering Ctr, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.98.137203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The detailed evolution of the magnitude of the local Jahn-Teller (JT) distortion in La1-xCaxMnO3 is obtained across the phase diagram for 0 <= x <= 0.5 from high-quality neutron diffraction data using the atomic pair distribution function method. A local JT distortion is observed in the insulating phase for all Ca concentrations studied. However, in contrast with earlier local structure studies, its magnitude is not constant, but decreases continuously with increasing Ca content. This observation is at odds with a simple small-polaron picture for the insulating state.

引用

页数：4

共 40 条

[1] Spin-polarized scanning tunneling microscopy on half-metallic manganite thin film with half-metallic manganite tip [J].

Akiyama, R ;

Tanaka, H ;

Matsumoto, T ;

Kawai, T .

APPLIED PHYSICS LETTERS, 2001, 79 (26) :4378-4380

[2] Intrinsic inhomogeneities in manganite thin films investigated with scanning tunneling spectroscopy [J].

Becker, T ;

Streng, C ;

Luo, Y ;

Moshnyaga, V ;

Damaschke, B ;

Shannon, N ;

Samwer, K .

PHYSICAL REVIEW LETTERS, 2002, 89 (23) :237203/1-237203/4

[3] Evidence for charge localization in the ferromagnetic phase of La1-xCaxMnO3 from high real-space-resolution x-ray diffraction [J].

Billinge, SJL ;

Proffen, T ;

Petkov, V ;

Sarrao, JL ;

Kycia, S .

PHYSICAL REVIEW B, 2000, 62 (02) :1203-1211

[4] Direct observation of lattice polaron formation in the local structure of La1-xCaxMnO3 [J].

Billinge, SJL ;

DiFrancesco, RG ;

Kwei, GH ;

Neumeier, JJ ;

Thompson, JD .

PHYSICAL REVIEW LETTERS, 1996, 77 (04) :715-718

[5] Local distortion of MnO6 octahedron in La1-xSrxMnO3+δ (x=0.1-0.9):: an EXAFS study [J].

Bindu, R ;

Pandey, SK ;

Kumar, A ;

Khalid, S ;

Pimpale, AV .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2005, 17 (41) :6393-6404

[6] Direct relationship between magnetism and MnO6 distortions in La1-xCaxMnO3 [J].

Booth, CH ;

Bridges, F ;

Kwei, GH ;

Lawrence, JM ;

Cornelius, AL ;

Neumeier, JJ .

PHYSICAL REVIEW LETTERS, 1998, 80 (04) :853-856

[7] Oxygen content and structures of La1-xCaxMnO3+d as a function of synthesis conditions [J].

Dabrowski, B ;

Dybzinski, R ;

Bukowski, Z ;

Chmaissem, O ;

Jorgensen, JD .

JOURNAL OF SOLID STATE CHEMISTRY, 1999, 146 (02) :448-457

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

Dagotto, E .

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

[9] 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

[10] Spatially inhomogeneous metal-insulator transition in doped manganites [J].

Fäth, M ;

Freisem, S ;

Menovsky, AA ;

Tomioka, Y ;

Aarts, J ;

Mydosh, JA .

SCIENCE, 1999, 285 (5433) :1540-1542

← 1 2 3 4 →