Superfluid Suppression in d-Wave Superconductors due to Disordered Magnetism

Details Superfluid Suppression in d-Wave Superconductors due to Disordered Magnetism Superfluid Suppression in d-Wave Superconductors due to Disordered Magnetism

2006-10-02

arxiv.org/abs/cond-mat/0610041v2

Phys. Rev. B 75, 024510 (2007)

Physics

Condensed Matter

Superconductivity

6 pages, 5 figures. Expanded discussion

Scientific paper

10.1103/PhysRevB.75.024510

The influence of static magnetic correlations on the temperature-dependent superfluid density \rho_s(T) is calculated for d-wave superconductors. In self-consistent calculations, itinerant holes form incommensurate spin density waves (SDW) which coexist with superconductivity. In the clean limit, the density of states is gapped, and \rho_s(T << T_c) is exponentially activated. In inhomogeneously-doped cases, the SDW are disordered and both the density of states and \rho_s(T) obtain forms indistinguishable from those in dirty but pure d-wave superconductors, in accordance with experiments. We conclude that the observed collapse of \rho_s at x\approx 0.35 in underdoped YBCO may plausibly be attributed to the coexistence of SDW and superconductivity.

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