Physics - Condensed Matter Seminar

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Condensed Matter Seminar - "Renaissance in the Ruthenates: some Ruminations on a Resolution"

Event Type
Seminar/Symposium
Sponsor
Physics - Condensed Matter
Virtual
wifi event
Date
Oct 30, 2020   1:00 pm  
Speaker
Peter Hirschfeld, University of Florida
Contact
Stephen Bullwinkel
E-Mail
bullwink@illinois.edu
Phone
217-333-1652
Views
28

Recent nuclear magnetic resonance studies [A. Pustogow et al., Nature 574, 72 (2019)] have challenged the prevalent chiral triplet pairing scenario proposed for the canonical unconventional superconductor
Sr2RuO4.  I present a detailed theoretical study of spin-fluctuation mediated pairing for this compound, mapping out the phase diagram as a function of spin-orbit coupling, interaction parameters, and band-structure properties over physically reasonable ranges, comparing when possible with photoemission and inelastic neutron scattering data information.  Even-parity pseudospin singlet solutions are found to dominate large regions of the phase diagram, leading to suggestions that accidentally degenerate representations may explain the data.  Next, I'll discuss the prospects of direct measurements of the superconducting gap by STM.  Interpreting such experiments requires a knowledge of the reconstructed surface band structure to interpret quasiparticle interference data.

Zoom link will be forwarded to Condensed Matter Seminar email list.  For a copy of the link or to be added to the email list, please contact Stephen Bullwinkel (bullwink@illinois.edu).

Recordings of Condensed Matter Seminar events can be found on mediaspace: https://mediaspace.illinois.edu/channel/Condensed%2BMatter%2BSeminar%2BTalks%2BFall%2B2020/178724052

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