Orbital selective phase transition

Yao Yao, Yu Zhong Zhang, Hunpyo Lee, Harald Olaf Jeschke, Roser Valentí, Hai Qing Lin, Chang Qin Wu

Research output: Contribution to journalReview article

5 Citations (Scopus)

Abstract

In this paper, we review theoretical investigations on the origin of the orbital selective phase where localized and itinerant electrons coexist in the d shell at intermediate strength of the on-site Coulomb interactions between electrons. In particular, the effect of spatial fluctuations on the phase diagram of the two-orbital Hubbard model with unequal bandwidths is discussed. And different band dispersions in different orbitals as well as different magnetically ordered states in different orbitals which are responsible for orbital selective phase transitions are emphasized. This is due to the fact that these two mechanisms are independent of the Hund's rule coupling, and are completely distinct from other well-known mechanisms like orbitals of unequal bandwidths and orbitals with different degeneracies. Moreover, crystal field splitting is not required in these two recently proposed mechanisms.

Original languageEnglish
Article number1330015
JournalModern Physics Letters B
Volume27
Issue number20
DOIs
Publication statusPublished - Aug 10 2013
Externally publishedYes

Keywords

  • Orbital selective
  • dynamical mean field theory
  • metal-to-insulator transition
  • multi-orbital Hubbard model

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics

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  • Cite this

    Yao, Y., Zhang, Y. Z., Lee, H., Jeschke, H. O., Valentí, R., Lin, H. Q., & Wu, C. Q. (2013). Orbital selective phase transition. Modern Physics Letters B, 27(20), [1330015]. https://doi.org/10.1142/S0217984913300159