Magnetic Fluctuations in Pair-Density-Wave Superconductors

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

doi:10.1103/PhysRevLett.116.167001

← Back to search

Magnetic Fluctuations in Pair-Density-Wave Superconductors

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

DOI 10.1103/PhysRevLett.116.167001 · Physical Review Letters

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

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)].

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La1.905Ba0.095CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La1.875Ba0.125CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown