Magnetic field induced lattice anomaly inside the superconducting state of CeCoIn${}_5$: evidence of the proposed Fulde-Ferrell-Larkin-Ovchinnikov state

V. F. Correa, T. P. Murphy, C. Martin +5

We report high magnetic field linear magnetostriction experiments on CeCoIn${}_5$ single crystals. Two features are remarkable: (i) a sharp discontinuity in all the crystallographic…