Superfluid Density in High-$T_c$ Superconductors: Enabled by Holes or Suppressed by Electrons?

Abstract

The critical temperature of an underdoped cuprate superconductor is limited by its phase stiffness $\rho$. In this Letter we argue that the dependence of $\rho$ on doping $x$ should be understood as a consequence of deleterious competition with antiferromagnetism at large electron densities, rather than as evidence for pairing of holes in the $x=0$ Mott insulator state. Our proposal is based on the observation that the correlation energy of a d-wave superconductor increases in magnitude at finite pairing wavevector when antiferromagnetic fluctuations are strong.

5 pages, 3 figures, new paragraphs added

References in corpus (8)

• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Quantum oscillations and the Fermi surface in an underdoped high-Tc superconductor
• Spins in the Vortices of a High Temperature Superconductor
• Spin ordering quantum transitions of superconductors in a magnetic field
• Quantum critical behaviour in the superfluid density of strongly underdoped ultrathin cuprate films
• Superfluid Density in a Highly Underdoped YBCO Superconductor
• Renormalized mean-field theory of the neutron scattering in cuprate superconductors
• Microscopic Functional Integral Theory of Quantum Fluctuations in Double-Layer Quantum Hall Ferromagnets

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• Resonant Plasmon-Axion Excitations Induced by Charge Density Wave Order in Weyl Semimetal
• ARPES, Neutrons, and the High-$T_c$ Mechanism
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