Coupled SDW and Superconducting Order in FFLO State of CeCoIn$_5$

Details Coupled SDW and Superconducting Order in FFLO State of CeCoIn$_5$ Coupled SDW and Superconducting Order in FFLO State of CeCoIn$_5$

2008-09-12

arxiv.org/abs/0809.2192v2

J. Phys. Soc. Jpn., Vol.77 (2008) 123703

Physics

Condensed Matter

Strongly Correlated Electrons

3pages, 1 figure, accepted for publication in J. Phys. Soc. Jpn., Vol.77 (2008), No.12

Scientific paper

10.1143/JPSJ.77.123703

The mechanism of incommensurate (IC) spin-density-wave (SDW) order observed in the Flude-Ferrell-Larkin-Ovchinnikov (FFLO) phase of CeCoIn$_5$ is discussed on the basis of new mode-coupling scheme among IC-SDW order, two superconducting orders of FFLO with B$_{1{\rm g}}$ ($d_{x^{2}-y^{2}}$) symmetry and $\pi$-pairing of odd-parity. Unlike the mode-coupling schemes proposed by Kenzelmann et al, Sciencexpress, 21 August (2008), that proposed in the present Letter can offer a simple explanation for why the IC-SDW order is observed only in FFLO phase and the IC wave vector is rather robust against the magnetic field.

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