Probing the d x2 - Y2 -wave Pomeranchuk instability by ultrasound

Hiroto Adachi, Manfred Sigrist

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Abstract

Selection rules of ultrasound attenuation and sound-velocity renormalization are analyzed in view of their potential application to identify Pomeranchuk instabilities (electronic nematic phase). It is shown that the transverse sound attenuation along [110] direction is enhanced by the Fermi-surface fluctuations near a d x2 - y2 -wave Pomeranchuk instability, while the attenuation along [100] direction remains unaffected. Moreover the fluctuation regime above the instability is analyzed by means of a self-consistent renormalization scheme. The results could be applied directly to Sr3 Ru2 O7 which is a potential candidate for a Pomeranchuk instability at its metamagnetic transition in strong magnetic fields.

Original languageEnglish
Article number155123
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number15
DOIs
Publication statusPublished - Oct 15 2009
Externally publishedYes

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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