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

Abstract

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${}_{1\mathrm{g}}$ ($d_{x^2-y^2}$) 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.

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

References in corpus (2)

• Reversible Tuning of the Heavy Fermion Ground State in CeCoIn${}_5$
• The quantum critical point in CeRhIn_5: a resistivity study

Cited by in corpus (6)

• Fulde-Ferrell-Larkin-Ovchinnikov phase in the presence of pair hopping interaction
• Inherent spin density wave instability by vortices in superconductors with strong Pauli effects
• The ab initio study of unconventional superconductivity in CeCoIn${}_5$ and FeSe
• Stability of FFLO states in optical lattices with bilayer structure
• Impurity-induced magnetic droplet in unconventional superconductors near magnetic instability: Application to Nd doped $\mathbf{CeCoI}{\mathbf{n}}_5$
• Switching dynamics of the spin density wave in superconducting CeCoIn5