Bandwidth-disorder phase diagram of half-doped layered manganites

被引：37
|
作者：
Mathieu, R.
Uchida, M.
Kaneko, Y.
He, J. P.
Yu, X. Z.
Kumai, R.
Arima, T.
Tomioka, Y.
Asamitsu, A.
Matsui, Y.
Tokura, Y.
机构：
[1] AIST, JST, Spin Superstruct Project,SSS, ERATO, Tsukuba, Ibaraki 3058562, Japan
[2] AIST, CERC, Tsukuba, Ibaraki 3058562, Japan
[3] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan
[4] Univ Tokyo, CRC, Bunkyo Ku, Tokyo 1130032, Japan
[5] NIMS, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan
[6] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan
来源：
PHYSICAL REVIEW B | 2006年 / 74卷 / 02期
关键词：
D O I：
10.1103/PhysRevB.74.020404
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Phase diagrams in the plane of r(A) (the average ionic radius, related to the one-electron bandwidth W) and sigma(2) (the ionic radius variance, measuring the quenched disorder), or bandwidth-disorder phase diagrams, have been established for perovskite manganites, with a three-dimensional (3D) Mn-O network. Here we establish the intrinsic bandwidth-disorder phase diagram of half-doped layered manganites with a two-dimensional (2D) Mn-O network, examining in detail the parent state of the colossal magnetoresistance phenomenon in crystals without ferromagnetic instability. The consequences of the reduced dimensionality, from 3D to 2D, for the order-disorder phenomena in the charge-orbital sectors are also highlighted.
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页数：4
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