Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session M15: Electronic Structure of Superconductors: Experiment
8:00 AM–10:36 AM,
Wednesday, March 6, 2024
Room: M100F
Sponsoring
Unit:
DCMP
Chair: Brian Moritz, SLAC National Accelerator Laboratory
Abstract: M15.00008 : Tracking emergence of superconductivity in perovskite BaPb1-xBixO3*
9:24 AM–9:36 AM
Presenter:
Wojciech R Pudelko
(Paul Scherrer Institut)
Authors:
Wojciech R Pudelko
(Paul Scherrer Institut)
Marco Barduci
(Università di Bologna)
Dariusz Gawryluk
(Paul Scherrer Institut)
Hang Li
(Paul Scherrer Institut)
Eduardo B Guedes
(Paul Scherrer Institut)
Muntaser Naamneh
(Ben-Gurion University)
Milan Radovic
(Paul Scherrer Institut)
Cesare Franchini
(University of Vienna)
Johan Chang
(University of Zurich)
Nicholas C Plumb
(Paul Scherrer Institute)
By preparing thin films with an in situ pulsed laser deposition system, we obtain the first ARPES data from BPBO for the parent metallic (x = 0) and optimally doped (x = 0.25) samples. We compare the results with DFT calculations. A near-Lifshitz transition predicted by some models, which might have defined the normal-superconductor transition with respect to x, appears to be avoided. In BPBO, we are able to resolve k-dependent quasiparticle lifetimes, as signatures of scattering along the zone diagonal. This is taken as evidence that (π, π, π)-directed phonon interactions, which are responsible for the insulating behavior in BBO, persist into the superconducting phase of BPBO.
*This work was supported by the Swiss National Science Foundation under project no. 200021_185037.
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