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

Autor: Burganov, B., Adamo, C., Mulder, A., Uchida, M., King, P. D. C., Harter, J. W., Shai, D. E., Gibbs, A. S., Mackenzie, A. P., Uecker, R., Bruetzam, M., Beasley, M. R., Fennie, C. J., Schlom, D. G., Shen, K. M.
Rok vydání: 2016
Předmět:
Zdroj: Phys. Rev. Lett. 116, 197003 (2016)
Druh dokumentu: Working Paper
DOI: 10.1103/PhysRevLett.116.197003
Popis: 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 (MBE), \emph{in situ} angle-resolved photoemission spectroscopy (ARPES), and transport measurements. Near the topological transition of the $\gamma$ 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.
Databáze: arXiv