The Order Parameters for Pairing and Phase Coherence in Cuprates; the Magnetic Origin of the Coherent Gap. The MCS Model of High-Tc Superconductivity

TL;DR

This paper investigates the magnetic origin of the coherent gap in hole-doped cuprates, proposing a model that links the order parameters for pairing and phase coherence with spin fluctuations, supported by neutron scattering data.

Contribution

It introduces the MCS model of high-Tc superconductivity, highlighting the magnetic nature of the coherent gap and its scaling with Tc in cuprates.

Findings

The coherent gap in hole-doped cuprates likely has a magnetic origin.

The gap scales with Tc as 2Dc/kBTc ≈ 5.4.

The model discusses symmetries of two order parameters.

Abstract

The phase diagram of order parameters for pairing and phase coherence in hole-doped cuprates is discussed. By examining carefully some recent inelastic neutron scattering data obtained on hole-doped cuprates and heavy fermion compound UPd2Al3 in which the superconductivity is mediated by spin fluctuations, we conclude that the coherent gap in hole-doped cuprates has most likely the magnetic origin and scales with Tc, on average, as 2Dc/kBTc = 5.4. We discuss a model of the superconductivity in hole-doped cuprates and the symmetries of two order parameters.