Condensation energy in the spin-fermion model for cuprates

Abstract

We use the Scalapino-White relation between the condensation energy and the difference between the dynamical structure factor in the normal and the superconducting states to compute the condensation energy in the spin-fermion model. We show that at strong coupling, the extra low-frequency spectral weight associated with the resonance peak in the dynamical structure factor in a superconductor is compensated only at energies $\sim J$ which are much larger than the superconducting gap $\Delta$. We argue that in this situation, the condensation energy is large and well accounts for the data for cuprates.

4 pages, 1 figure

References in corpus (3)

• The Magnetic Excitation Spectrum and Thermodynamics of High-$T_c$ Superconductors
• A relation between the resonance neutron peak and ARPES data in cuprates
• Spin-fermion model near the quantum critical point: one-loop renormalization group results

Cited by in corpus (6)

• The effect of collective spin-1 excitations on electronic spectra in high-Tc superconductors
• The neutron resonance in the cuprates and its effect on fermionic excitations
• Kinetic Energy, Condensation Energy, Optical Sum Rule and Pairing Mechanism in High-Tc Cuprates
• Superconducting condensation energy and neutron resonance in high-Tc superconductors
• Condensation energy in Eliashberg theory -- from weak to strong coupling
• Condensation energy of the homogeneous electron gas from the density functional theory for superconductors