title: Evolution of Fermi-liquid interactions in Sr2RuO4 under pressure.
abstract: 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 approximately 3 GPa.
authors.affiliation: Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB3 OHE, United Kingdom.
authors.forename: D
authors.initials: D
authors.lastname: Forsythe
authors.forename: S R
authors.initials: SR
authors.lastname: Julian
authors.forename: C
authors.initials: C
authors.lastname: Bergemann
authors.forename: E
authors.initials: E
authors.lastname: Pugh
authors.forename: M J
authors.initials: MJ
authors.lastname: Steiner
authors.forename: P L
authors.initials: PL
authors.lastname: Alireza
authors.forename: G J
authors.initials: GJ
authors.lastname: McMullan
authors.forename: F
authors.initials: F
authors.lastname: Nakamura
authors.forename: R K W
authors.initials: RK
authors.lastname: Haselwimmer
authors.forename: I R
authors.initials: IR
authors.lastname: Walker
authors.forename: S S
authors.initials: SS
authors.lastname: Saxena
authors.forename: G G
authors.initials: GG
authors.lastname: Lonzarich
authors.forename: A P
authors.initials: AP
authors.lastname: Mackenzie
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Mao
authors.forename: Y
authors.initials: Y
authors.lastname: Maeno