Fulde-Ferrell-Larkin-Ovchinnikov State in a Quasi-Dimensional Organic Superconductor
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概要
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The possibility of the existence Ftrlde-Ferrell-Larkin-Ovchinnikov (FFLO) state in quasi-low-dimensional organic svrpercondtzctors is discussed. The critical field and the wave number q ofthe spatial oscillation are calctrlated on the basis of a tight binding model of x-[BBDT-TTF]zI3,as an example. The critical fields H. at T:0 are estirnarted to be roughly 1.5, 2, and 2,5 tinaes thePauli pararnagnetic limit Hv? for .s-wave, V...,-wave, and d.c .z-wave FFLO states, respectively.We disctmss which properties of the strtrctttre of the Fermat sttrface enhance the critical field andare relevant to the direction of q. We show that the ntumber of the lines on the displaced Fermisurfaces due to the Zeetnan energy xvhich sitnaltaneotrsly touch by translation p + p % q areirnportant in additioua to the cturv?rture of the Fernai surface and the density of states.
- 社団法人日本物理学会の論文
- 1997-03-15
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