Evolution of Fermi-liquid interactions in Sr2RuO4 under pressure

D Forsythe, S R Julian, C Bergemann, E Pugh, M J Steiner, P L Alireza, G J McMullan, F Nakamura, R K W Haselwimmer, I R Walker, S S Saxena, G G Lonzarich, A P Mackenzie, Z Q Mao, Y Maeno

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30 Citations (Scopus)


We have measured the temperature and field dependence of the resistivity of the unconventional superconductor Sr2RuO4 at pressures up to 3.3 GPa. Using the Shubnikov-de Haas effect, we find that the Fermi surface sheet believed to be primarily responsible for superconductivity becomes more two-dimensional with increasing pressure, a surprising result that is, however, consistent with a recent model of orbital-dependent superconductivity in this system. Many-body enhancements and the superconducting transition temperature all fall gradually with increasing pressure, contrary to previous suggestions of a ferromagnetic quantum critical point at similar to3 GPa.

Original languageEnglish
Number of pages4
JournalPhysical Review Letters
Publication statusPublished - 14 Oct 2002




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