FFLO-wave-vector Lock-in Effect in Quasi-1D Superconductors

Mihail D. Croitoru (1, 2) , Alexandre I. Buzdin (3, 1)

1 LOMA - Laboratoire Ondes et Matière d'Aquitaine
2 Departement Fysica, Universiteit Antwerpen
3 IUF - Institut universitaire de France

We study the phase transition into the Fulde-Ferrell-Larkin-Ovchinnikov state in high magnetic field in quasi-one dimensional superconductors within the quasi-classical formalism, taking into account the interchain Josephson coupling and the paramagnetic spin splitting. We show that anomalies in the field-direction dependence of the upper critical field when the magnetic field length equals to the FFLO period, previously described in [29], are characterized by the lock-in effect of the FFLO modulation wave vector, which is governed by the magnetic length.

Domaines: Supraconductivité [cond-mat.supr-con]

Mihail D. Croitoru, Alexandre I. Buzdin. FFLO-wave-vector Lock-in Effect in Quasi-1D Superconductors. Journal of Superconductivity and Novel Magnetism, 2015, 28 (4), pp.1305-1308. ⟨10.1007/s10948-014-2910-8⟩. ⟨hal-01155491⟩