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Strain Control of Fermiology and Many-Body Interactions in Two-Dimensional Ruthenates.

  • Author(s): Burganov, B
  • Adamo, C
  • Mulder, A
  • Uchida, M
  • King, PDC
  • Harter, JW
  • Shai, DE
  • Gibbs, AS
  • Mackenzie, AP
  • Uecker, R
  • Bruetzam, M
  • Beasley, MR
  • Fennie, CJ
  • Schlom, DG
  • Shen, KM
  • et al.

Published Web Location

https://arxiv.org/abs/1605.05669
No data is associated with this publication.
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.

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