Hidden Two-Dimensional Superconductivity in a Non-Centrosymmetric Compound

by Mrs. Tehila Shamsian

BGU

at Condensed Matter Seminar

Tue, 08 Jul 2025, 13:10
Sacta-Rashi Building for Physics (54), room 207

Abstract

** 25 min talk + 5 min questions, Eran Maniv's MSc student **

Odd-parity superconductors are key to understanding unconventional
superconductivity and the emergence of chiral topological quasiparticles. Recent
studies have highlighted the role of broken symmetries in stabilizing such exotic states.
La3Bi4Pt3, which becomes superconducting below 1.4 K , lacks inversion symmetry, a
feature that can lead to unconventional superconductivity with possible nodes in the
superconducting gap function. Our transport measurements reveal an unexpected
enhancement of superconductivity beyond the bulk critical transition temperature and
critical magnetic field, accompanied by a pronounced anisotropy indicating a transition
from three-dimensional to two-dimensional behavior. These findings, further supported
by thermodynamic measurements, provide strong evidence for surface
superconductivity and two-dimensional superconducting current flow, reinforcing the
intricate link between symmetry breaking and exotic superconducting phenomena.

Created on 02-07-2025 by Bar Lev, Yevgeny (ybarlev)
Updaded on 02-07-2025 by Bar Lev, Yevgeny (ybarlev)