Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session X05: Topological Superconductivity: General II
8:00 AM–11:00 AM,
Friday, March 8, 2019
BCEC
Room: 108
Sponsoring
Unit:
DMP
Chair: Tay-Rong Chang, National Cheng Kung University
Abstract: X05.00006 : Superconductor Quasiparticles with Random Curvature, Robust Criticality, and T-Linear Resistivity
9:00 AM–9:12 AM
Presenter:
Matthew Foster
(Physics & Astronomy, Rice University)
Authors:
Sayed Ali Akbar Ghorashi
(Physics, College of William & Mary)
Matthew Foster
(Physics & Astronomy, Rice University)
Random curvature is strongly irrelevant at zero energy, but we show that it profoundly affects the finite-energy states. These are found to exhibit robust, universal criticality (see also Ghorashi, Liao, and Foster, PRL 2018). Our results imply that the local density of states imaged via STM would exhibit minimal spatial structure near zero bias, but robust, static and universal fluctuations over a large finite bias range.
We also consider a speculative connection to the pseudogap regime. Assuming that the superfluid component is quenched by phase fluctuations, we calculate the electrical conductivity. Preliminary results indicate linear-in-T resistivity, attributed to the crossover between ballistic and critical states at zero and finite-energy, respectively.
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