Mixed-valence manganites: fundamentals and main properties

被引:154
作者
Gor'kov, LP
Kresin, VZ [1 ]
机构
[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
[2] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
[3] Russian Acad Sci, LD Landau Theoret Phys Inst, Moscow 117334, Russia
来源
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS | 2004年 / 400卷 / 03期
关键词
manganites; percolation; doping phases;
D O I
10.1016/j.physrep.2004.08.003
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The study of manganites has been undergoing intensive development, especially following the discovery of colossal magnetoresistance (CMR). The most fundamental property of these materials is a strong correlation between their transport and magnetic properties. A transition to the ferromagnetic (and metallic) state occurs at a finite doping level and represents a special type of transition which should be described in terms of percolation theory. The same applies for the transition at the Curie temperature. As a result of the percolation theory approach, the view of these materials, both above and below the transition point, is that of inhomogeneous media consisting of tiny islands of interweaving sub-phases. These basic ideas have been now verified experimentally by neutron data, X-ray analysis, Mossbauer spectroscopy, heat capacity and magnetization measurements, etc. The phase diagram as a function of doping displays a peculiar electron-hole asymmetry; this asymmetry as well as other features (e.g., the optical properties) can be explained in the framework of a generalized two-band picture. We trace how the ground state evolves with doping and give a self-consistent analysis of various thermodynamic, optical and transport properties of metallic manganites, isotope effect, etc. It is predicted that giant oscillations in the Josephson current of a S-AFM-S junction will occur as a function of weak external magnetic fields. The contact phenomena are also described. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:149 / 208
页数:60
相关论文
共 141 条
[1]  
Abrikosov A., 1975, METHODS QUANTUM FIEL
[2]   Antiferromagnetic metallic state in doped manganites [J].
Akimoto, T ;
Maruyama, Y ;
Moritomo, Y ;
Nakamura, A ;
Hirota, K ;
Ohoyama, K ;
Ohashi, M .
PHYSICAL REVIEW B, 1998, 57 (10) :R5594-R5597
[3]   CONSIDERATIONS ON DOUBLE EXCHANGE [J].
ANDERSON, PW ;
HASEGAWA, H .
PHYSICAL REVIEW, 1955, 100 (02) :675-681
[4]   NEW APPROACH TO THE THEORY OF SUPEREXCHANGE INTERACTIONS [J].
ANDERSON, PW .
PHYSICAL REVIEW, 1959, 115 (01) :2-13
[5]  
Barone A., 1982, Physics and applications of the Josephson effect
[6]   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
[7]   POSSIBLE HIGH-TC SUPERCONDUCTIVITY IN THE BA-LA-CU-O SYSTEM [J].
BEDNORZ, JG ;
MULLER, KA .
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1986, 64 (02) :189-193
[8]   Isotope effect on properties of CMR manganites [J].
Belova, LM .
JOURNAL OF SUPERCONDUCTIVITY, 2000, 13 (02) :305-312
[9]  
Bersuker I. B., 1989, VIBRONIC INTERACTION
[10]  
Bersuker I. B., 1996, ELECT STRUCTURE PROP