Probing thedx2−y2-wave Pomeranchuk instability by ultrasound

2009/07/31 by Hiroto Adachi, H. Adachi, Manfred Sigrist
Physics and Astronomy · #Advanced Condensed Matter Physics #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Instability #Mathematical physics #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Renormalization #cond-mat.mtrl-sci #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.80.155123

published as Phys. Rev. B 80, 155123 (2009) · 14 pages, 12 figures

openalex publication_date 2009/10/15 · arxiv created 2009/10/23 · arxiv updated 2015/05/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

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\ensuremath-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.

Citations

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