Numerical study of t2g orbital system with ferromagnetic polarization

Takayoshi Tanaka, Sumio Ishihara

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Finite-temperature orbital state in a ferromagnetic Mott insulator with triply degenerate t2g orbital is investigated numerically. We employ the quantum Monte Carlo simulation with the loop algorithm. Indications for conventional staggered-type orbital order are not remarkable down to the lowest temperature to which the present simulation can get access. Physical parameters monitoring the off-diagonal orbital order, which is characterized by a linear combination of the (dyz, dzx, dxy) orbital-wave functions with equal weights, are not conspicuous. It is found that an orbital gaplike behavior appears in the uniform orbital susceptibility. This is supported by a threshold behavior in the staggered correlation function in a calculation with the additional Ising-type interaction. Some rigorous remarks for the long-range orbital order are also presented.

Original languageEnglish
Article number153106
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number15
DOIs
Publication statusPublished - 2008 Oct 15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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