Probing the d_{x2-y2}-wave Pomeranchuk instability by ultrasound

Details Probing the d_{x2-y2}-wave Pomeranchuk instability by ultrasound Probing the d_{x2-y2}-wave Pomeranchuk instability by ultrasound

2009-07-13

arxiv.org/abs/0907.2081v2

Phys. Rev. B 80, 155123 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

14 pages, 12 figures

Scientific paper

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 Sr3Ru2O7 which is a potential candidate for a Pomeranchuk instability at its metamagnetic transition in strong magnetic fields.

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