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arXiv · 1003.0309

Antiferromagnetic ordering induced by paramagnetic depairing in unconventional superconductors

Ryusuke Ikeda·Yuhki Hatakeyama·Kazushi Aoyama
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Abstract

Antiferromagnetic (AFM) (or spin-density wave) quantum critical fluctuation enhanced just below H_c2(0) have been often observed in d-wave superconductors with a strong Pauli paramagnetic depairing (PD) including CeCoIn_5. It is shown here that such a tendency of field-induced AFM ordering is a consequence of strong PD and should appear particularly in superconductors with a gap node along the AFM modulation. Two phenomena seen in CeCoIn_5, the anomalous vortex lattice form factor and the AFM order in the Fulde-Ferrell-Larkin-Ovchinnikov state, are explained based on this peculiar PD effect.

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Ryusuke Ikeda, Yuhki Hatakeyama, Kazushi Aoyama. 2010-06-15. Antiferromagnetic ordering induced by paramagnetic depairing in unconventional superconductors. https://doi.org/10.1103/physrevb.82.060510

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