• DOI:10.1103/PhysRevB.92.224512
• Corpus ID: 118348062

Fulde-Ferrell-Larkin-Ovchinnikov states in a superconducting ring with magnetic fields: Phase diagram and the first-order phase transitions

@article{Yoshii2014FuldeFerrellLarkinOvchinnikovSI,
  title={Fulde-Ferrell-Larkin-Ovchinnikov states in a superconducting ring with magnetic fields: Phase diagram and the first-order phase transitions},
  author={Ryosuke Yoshii and Satoshi Takada and Shunji Tsuchiya and Giacomo Marmorini and Hisao Hayakawa and Muneto Nitta},
  journal={Physical Review B},
  year={2014},
  volume={92},
  pages={224512}
}

• R. Yoshii, S. Takada, +3 authors M. Nitta
• Published 14 April 2014
• Physics
• Physical Review B

We find the angular Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) states (or the twisted kink crystals) in which a phase and an amplitude of a pair potential modulate simultaneously in a quasi-one-dimensional superconducting ring with a static Zeeman magnetic field applied on the ring and static Aharonov-Bohm magnetic flux penetrating the ring. The superconducting ring with magnetic flux produces a persistent current, whereas the Zeeman split of Fermi energy results in the spatial modulation of the pair potential. We show that these two magnetic fields stabilize the FFLO phase in a large parameter region of the magnetic fields. We further draw the phase diagram with the two kinds of first-order phase transitions; one corresponds to phase slips separating the Aharonov-Bohm magnetic flux, and the other separates the number of peaks of the pair amplitude for the Zeeman magnetic field.