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  direction is enhanced by the Fermi-surface fluctuations near a d x2 - y2 -wave Pomeranchuk instability, while the attenuation along  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.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - Oct 15 2009|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics