Berlin 2018 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 83: Superconductivity: (General) Theory
TT 83.1: Talk
Thursday, March 15, 2018, 09:30–09:45, HFT-FT 101
High-field superconductivity in ultra-thin films, interfaces, and superlattices — •Gertrud Zwicknagl1, Lukas Debbeler1,2, Simon Jahns1, and Peter Fulde3 — 1Institut f. Mathemat. Physik, TU Braunschweig, Germany — 2Dept. of Physics, University of Oregon, Eugene, OR 97403 (USA) — 3MPI f. Physik komplexer Systeme, Dresden, Germany
In recent years, the manufacturing of controlled ultra-thin superconducting films has made impressive progress. Important examples are monoatomic or monomolecular layers on a substrate, superconducting layers in a superlattice, or superconducting interfaces and surfaces. These systems have in common the absence of inversion symmetry and hence the presence of Rashba-type spin-orbit interaction which can be tuned to some extent.
We discuss the superconducting properties of ultra-thin superconducting films with Rashba spin-orbit interaction in the presence of a parallel magnetic field. Thereby we cover the range from small to large spin-orbit interactions compared with the gap parameter. We find abrupt changes in the superconducting state at a critical value spin-orbit energy λc. We speculate that this might give rise to new phenomena.