Mott-Anderson transition controlled by a magnetic field in pyrochlore molybdate

被引：24

作者：

Hanasaki, N ^{[1
]}

Kinuhara, M

Kézsmárki, I

Iguchi, S

Miyasaka, S

Takeshita, N

Terakura, C

Takagi, H

Tokura, Y

机构：

[1] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[2] ERATO, Japan Sci & Technol Agcy, Spin Superstruct Proj, Tsukuba, Ibaraki 3058562, Japan

[3] Natl Inst Adv Ind Sci & Technol, Correlated Elect Res Ctr, Tsukuba, Ibaraki 3058562, Japan

[4] Univ Tokyo, Dept Adv Mat Sci, Kashiwa, Chiba 2778581, Japan

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.96.116403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The pyrochlore molybdate Gd2Mo2O7 locates near the phase boundary between the ferromagnetic-metallic and the spin-glass insulating state. This metal-insulator transition is governed on a large energy scale by the electron-correlation effect, while the geometrical frustration causes the random potential. The magnetic field can tune the randomness of the potential and control, under a suitable pressure, the continuous Mott-Anderson transition precisely. The critical exponent (mu=1.04 +/- 0.1) of the Mott-Anderson transition has been determined for this ferromagnetic orbital-degenerate electron system.

引用

页数：4

共 31 条

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