Fulde-Ferrel-Larkin-Ovchinnikov Inhomogeneous Superconducting State and Phase Transitions Induced by Spin Accumulation in a Ferromagnet-$d_{x^2-y^2}$-Wave Superconductor-Ferromagnet Tunnel Junction

Biao Jin, Gang Su, Qing-Rong Zheng

Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) inhomogeneous superconducting (SC) state, first- and second-order phase transitions, and quantum criticality induced by spin accumulation in…