- 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.
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.