Randomly diluted eg orbital-ordered systems

T. Tanaka, M. Matsumoto, S. Ishihara

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Dilution effects on the long-range ordered state of the doubly degenerate eg orbital are investigated. Quenched impurities without the orbital degree of freedom are introduced in the orbital model where the long-range order is realized by the order-from-disorder mechanism. It is shown by Monte Carlo simulations and the cluster-expansion method that a decrease in the orbital-ordering temperature by dilution is substantially larger than that in the randomly diluted spin models. Tilting of orbital pseudospins around impurities is the essence of this dilution effect. The present theory provides a new viewpoint for the recent resonant x-ray scattering experiments in KCu1-xZnxF3.

Original languageEnglish
Article number267204
JournalPhysical Review Letters
Volume95
Issue number26
DOIs
Publication statusPublished - 2005 Dec 31

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Randomly diluted eg orbital-ordered systems'. Together they form a unique fingerprint.

  • Cite this