title: Strain Control of Fermiology and Many-Body Interactions in Two-Dimensional Ruthenates.
abstract: Here we demonstrate how the Fermi surface topology and quantum many-body interactions can be manipulated via epitaxial strain in the spin-triplet superconductor Sr_{2}RuO_{4} and its isoelectronic counterpart Ba_{2}RuO_{4} using oxide molecular beam epitaxy, in situ angle-resolved photoemission spectroscopy, and transport measurements. Near the topological transition of the γ Fermi surface sheet, we observe clear signatures of critical fluctuations, while the quasiparticle mass enhancement is found to increase rapidly and monotonically with increasing Ru-O bond distance. Our work demonstrates the possibilities for using epitaxial strain as a disorder-free means of manipulating emergent properties, many-body interactions, and potentially the superconductivity in correlated materials.
authors.affiliation: Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York 14853, USA.
authors.forename: B
authors.initials: B
authors.lastname: Burganov
authors.affiliation: Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA.|Department of Applied Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: C
authors.initials: C
authors.lastname: Adamo
authors.affiliation: School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.
authors.forename: A
authors.initials: A
authors.lastname: Mulder
authors.affiliation: Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York 14853, USA.
authors.forename: M
authors.initials: M
authors.lastname: Uchida
authors.affiliation: Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York 14853, USA.|School of Physics and Astronomy, University of St Andrews, St Andrews, Fife KY16 9SS, United Kingdom.|Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, USA.
authors.forename: P D C
authors.initials: PD
authors.lastname: King
authors.affiliation: Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York 14853, USA.
authors.forename: J W
authors.initials: JW
authors.lastname: Harter
authors.affiliation: Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York 14853, USA.
authors.forename: D E
authors.initials: DE
authors.lastname: Shai
authors.affiliation: Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany.
authors.forename: A S
authors.initials: AS
authors.lastname: Gibbs
authors.affiliation: School of Physics and Astronomy, University of St Andrews, St Andrews, Fife KY16 9SS, United Kingdom.|Max Planck Institute for Chemical Physics of Solids, D-01187 Dresden, Germany.
authors.forename: A P
authors.initials: AP
authors.lastname: Mackenzie
authors.affiliation: Leibniz Institute for Crystal Growth, D-12489 Berlin, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Uecker
authors.affiliation: Leibniz Institute for Crystal Growth, D-12489 Berlin, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Bruetzam
authors.affiliation: Department of Applied Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: M R
authors.initials: MR
authors.lastname: Beasley
authors.affiliation: School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.
authors.forename: C J
authors.initials: CJ
authors.lastname: Fennie
authors.affiliation: Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA.|Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, USA.
authors.forename: D G
authors.initials: DG
authors.lastname: Schlom
authors.affiliation: Laboratory of Atomic and Solid State Physics, Department of Physics, Cornell University, Ithaca, New York 14853, USA.|Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, USA.
authors.forename: K M
authors.initials: KM
authors.lastname: Shen