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

N. Hanasaki, M. Kinuhara, I. Kézsmárki, Satoshi Iguchi, S. Miyasaka, N. Takeshita, C. Terakura, H. Takagi, Y. Tokura

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

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 (μ=1.04±0.1) of the Mott-Anderson transition has been determined for this ferromagnetic orbital-degenerate electron system.

Original languageEnglish
Article number116403
JournalPhysical Review Letters
Volume96
Issue number11
DOIs
Publication statusPublished - 2006 Mar 30
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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