Emergent anisotropy in the Fulde-Ferrell-Larkin-Ovchinnikov state.

ABSTRACT: Exotic superconductivity is formed by unconventional electron pairing and exhibits various unique properties that cannot be explained by the basic theory. The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state is known as an exotic superconducting state in that the electron pairs have a finite center-of-mass momentum leading to a spatially modulated pattern of superconductivity. The spatial modulation endows the FFLO state with emergent anisotropy. However, the anisotropy has never been experimentally verified despite numerous efforts over the years. Here, we report detection of anisotropic acoustic responses depending on the sound propagation direction appearing above the Pauli limit. This anisotropy reveals that the two-dimensional FFLO state has a center-of-mass momentum parallel to the nest

SUBMITTER: Imajo S 

PROVIDER: S-EPMC9530125 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature