Orbital nematic instability in the two-orbital Hubbard model: Renormalization-group + constrained RPA analysis

Masahisa Tsuchiizu, Yusuke Ohno, Seiichiro Onari, Hiroshi Kontani

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Motivated by the nematic electronic fluid phase in Sr3Ru 2O7, we develop a combined scheme of the renormalization-group method and the random-phase-approximation-type method, and analyze orbital susceptibilities of the (dxz, dyz)- orbital Hubbard model with high accuracy. It is confirmed that the present model exhibits a ferro-orbital instability near the magnetic or superconducting quantum criticality, due to the Aslamazov-Larkin-type vertex corrections. This mechanism of orbital nematic order presents a natural explanation for the nematic order in Sr3Ru2O7, and is expected to be realized in various multiorbital systems, such as Fe-based superconductors.

Original languageEnglish
Article number057003
JournalPhysical Review Letters
Volume111
Issue number5
DOIs
Publication statusPublished - Jul 30 2013

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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