Magnetic Fluctuations in Pair-Density-Wave Superconductors

Morten H. Christensen, Henrik Jacobsen, Thomas A. Maier, Brian M. Andersen

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Abstract

Pair-density-wave superconductivity constitutes a novel electronic condensate proposed to be realized in certain unconventional superconductors. Establishing its potential existence is important for our fundamental understanding of superconductivity in correlated materials. Here we compute the dynamical magnetic susceptibility in the presence of a pair-density-wave ordered state and study its fingerprints on the spin-wave spectrum including the neutron resonance. In contrast to the standard case of d-wave superconductivity, we show that the pair-density-wave phase exhibits neither a spin gap nor a magnetic resonance peak, in agreement with a recent neutron scattering experiment on underdoped La1.905Ba0.095CuO4 [Z. Xu et al., Phys. Rev. Lett. 113, 177002 (2014)].

Original languageEnglish (US)
Article number167001
JournalPhysical review letters
Volume116
Issue number16
DOIs
StatePublished - Apr 18 2016

Bibliographical note

Publisher Copyright:
© 2016 American Physical Society.

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