Theory of spontaneous Fermi surface symmetry breaking for Sr3 Ru2 O7

Hiroyuki Yamase, Andrey A. Katanin

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We show that many salient features observed around the metamagnetic transition in Sr3 Ru2 O7 are described within a simple model, which considers only an instability of the Fermi surface symmetry breaking (Pomeranchuk instability), without invoking a putative metamagnetic quantum critical end point as usually assumed for this compound. In our model, the Pomeranchuk instability and unconventional, non-Fermi liquid type properties arise due to the tuning of the van Hove singularity of either a majority or a minority spin band to the vicinity of the Fermi energy by a magnetic field. The obtained phase diagram, the metamagnetic transition, and the temperature dependence of the magnetic susceptibility and specific heat show striking similarities to the experimental data.

Original languageEnglish
Pages (from-to)1262-1264
Number of pages3
JournalPhysica B: Condensed Matter
Volume403
Issue number5-9
DOIs
Publication statusPublished - 1 Apr 2008
Externally publishedYes

Keywords

  • Fermi surface
  • Metamagnetism
  • Pomeranchuk instability
  • Quantum critical points

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