Exotic pairing state in quasicrystalline superconductors under magnetic field
Abstract
We theoretically study the effect of a magnetic field on quasicrystalline superconductors, by modelling them as the attractive Hubbard model on the Penrose-tiling structure. We find that at low temperatures and under a high magnetic field there appears an exotic superconducting state with the order parameter changing its sign in real space. We discuss the state in comparison with the Fulde-Ferrell-Larkin-Ovchinnikov state proposed many years ago for periodic systems, clarifying commonalities and differences. It is remarkable that, even in the absence of periodicity, the electronic system finds a way to keep a coherent superconducting state with a spatially sign-changing order parameter compatible with the underlying quasiperiodic structure.
Keywords
Cite
@article{arxiv.1905.01487,
title = {Exotic pairing state in quasicrystalline superconductors under magnetic field},
author = {Shiro Sakai and Ryotaro Arita},
journal= {arXiv preprint arXiv:1905.01487},
year = {2019}
}
Comments
7 pages, 8 figures