Superconductivity and Quantum Spin Disorder in Cuprates

Abstract

A fundamental connection between superconductivity and quantum spin fluctuations in underdoped cuprates, is revealed. A variational calculation shows that {\em Cooper pair hopping} strongly reduces the local magnetization $m_0$. This effect pertains to recent neutron scattering and muon spin rotation measurements in which $m_0$ varies weakly with hole doping in the poorly conducting regime, but drops precipitously above the onset of superconductivity.

References in corpus (1)

• Charge- versus spin driven stripe order: the role of transversal spin fluctuations

Cited by in corpus (10)

• Local Magnetic Order vs. Superconductivity in a Layered Cuprate
• Plaquette Boson-Fermion Model of Cuprates
• Some formal results for the valence bond basis
• Hole concentration dependence of the magnetic moment in superconducting and insulating La2-xSrxCuO4
• Variational ground states of 2D antiferromagnets in the valence bond basis
• Universal doping dependence of the ground state staggered magnetization in cuprates
• Resonating valence bond trial wave functions with both static and dynamically determined Marshall sign structure
• Correlated valence-bond states
• Evidence of magnetic mechanism for cuprate superconductivity
• Projected SO(5) Hamiltonian for Cuprates and Its Applications