Exotic pairing state in quasicrystalline superconductors under a magnetic field

Shiro Sakai; Ryotaro Arita

doi:10.1103/PhysRevResearch.1.022002

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Exotic pairing state in quasicrystalline superconductors under a magnetic field

Shiro Sakai, Ryotaro Arita

DOI 10.1103/PhysRevResearch.1.022002 · Physical Review Research

T1

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Abstract

We theoretically study the effect of a magnetic field on quasicrystalline superconductors, by modeling them as an attractive Hubbard model on a 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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
AlZnMg Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown