Enhancement of Electronic Spin Susceptibility in Pauli Limited Unconventional Superconductors

Abstract

We calculate the wave-vector dependent electronic spin susceptibility ${\chi }_{\alpha \beta }(\mathbf{q},{\mathbf{H}}_0)$ of a d-wave superconductor in uniform magnetic field ${\mathbf{H}}_0$ with Pauli pair-breaking. We find that the transverse component of the susceptibility tensor can be greater than its normal state value; the longitudinal component also slightly increases but in a very limited range of $q$s. We identify several wave vectors $\{{\mathbf{q}}_{\perp },{\mathbf{q}}_{\parallel }\}$, that correspond to the maxima of either ${\chi }_{\perp }$ or ${\chi }_{\parallel }$. We compare our results with available data on the high-field phase in heavy-fermion CeCoIn${}_5$.

4+ pages, 4 figures

References in corpus (6)

• Imaging Cooper Pairing of Heavy Fermions in CeCoIn5
• Reversible Tuning of the Heavy Fermion Ground State in CeCoIn${}_5$
• Superconductivity and spin-density-waves in multi-band metals
• Electronic tuning and uniform superconductivity in CeCoIn5
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Cited by in corpus (2)

• Possible Triplet Superconducting Order in Magnetic Superconducting Phase induced by Paramagnetic Pair-Breaking
• Spin susceptibility of Andreev bound states