Strain control of Fermiology and many-body interactions in two-dimensional ruthenates
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Here we demonstrate how the Fermi surface topology and quantum many-body interactions can be manipulated via epitaxial strain in the spin-triplet superconductor Sr2RuO4 and its isoelectronic counterpart Ba2RuO4 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.
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 2016 , ' Strain control of Fermiology and many-body interactions in two-dimensional ruthenates ' , Physical Review Letters , vol. 116 , no. 19 , 197003 . https://doi.org/10.1103/PhysRevLett.116.197003
Physical Review Letters
© 2016, American Physical Society. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at journals.aps/org / https://dx.doi.org/10.1103/PhysRevLett.116.197003
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