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arXiv 1011.4497cond-mat.supr-con
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超导体(TMTSF)2ClO 4中Larkin-Ovchinnikov-Fulde-Ferrell相的理论与实验

Larkin-Ovchinnikov-Fulde-Ferrell phase in the superconductor (TMTSF)2ClO4: Theory versus experiment

A. G. Lebed, Si Wu

摘要:

我们考虑了准一维(Q1 D)导体在平行于其导电链的磁场中Larkin-Ovchinnikov-Fulde-Ferrell(LOFF)相的形成,其中我们考虑了顺磁自旋分裂和轨道破坏对超导性的影响.我们发现,由于在Q1 D的情况下,轨道效应相对较弱,LOFF相出现在(TMTSF)$_2$ ClO $_4$超导体的Q1 D带参数的实值。我们将我们的理论计算与Y. Maeno群[S. Yonezawa等人,物理修订版信函\textbf{100},117002(2008)],并表明理论和实验数据之间存在良好的定性和定量一致性。

英文摘要:

We consider a formation of the Larkin-Ovchinnikov-Fulde-Ferrell (LOFF) phase in a quasi-one-dimensional (Q1D) conductor in a magnetic field, parallel to its conducting chains, where we take into account both the paramagnetic spin-splitting and orbital destructive effects against superconductivity. We show that, due to a relative weakness of the orbital effects in a Q1D case, the LOFF phase appears in (TMTSF)$_2$ClO$_4$ superconductor for real values of its Q1D band parameters. We compare our theoretical calculations with the recent experimental data by Y. Maeno's group [S. Yonezawa et al., Phys. Rev. Lett. \textbf{100}, 117002 (2008)] and show that there is a good qualitative and quantitative agreement between the theory and experimental data.

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