Fulde–Ferrell–Larkin–Ovchinnikov State in Quasi-One-Dimensional Systems: Correlation between Fermi-Surface Distortion and Optimal In-Plane Magnetic-Field Direction
作者: Katsumi ItahashiHiroshi Shimahara
刊名: Journal of the Physical Society of Japan, 2020, Vol.89 (2)
来源数据库: The physical Society of Japan
DOI: 10.7566/JPSJ.89.024708
原始语种摘要: The Fulde–Ferrell–Larkin–Ovchinnikov (FFLO) state is systematically examined in a generic model of quasi-one-dimensional (Q1D) type-II superconductors that has six hopping integrals of electrons as model parameters. For a magnetic field parallel to the conductive layers, the upper critical field H c2 is strongly enhanced by the FFLO state at low temperatures and sensitively depends on the angle ϕ between the in-plane magnetic field and the highly conductive chain (the crystal a -axis). As a result, H c2 exhibits sharp peaks at the optimal angles ϕ = ± ϕ 0. Since the optimal angle ϕ 0 strongly depends on the structure of the Fermi surface, we examine their correlation, searching for an intuitive method to find ϕ 0 from the shape of the...
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  • optimal 最佳的
  • between 在中间
  • estimate 估计
  • purpose 目的
  • state 状态
  • angle 
  • roughly 粗略地
  • systematically 系统地
  • field 
  • distortion 畸变