A pairing hypothesis based on resonating valence bond state for hole doped copper oxide high temperature superconductors

TL;DR

This paper develops a new theoretical framework for hole-doped copper oxide high-temperature superconductors by modifying Anderson's RVB-based pseudogap hypothesis, explaining the dome-shaped phase diagram and higher critical temperatures.

Contribution

The paper introduces three new hypotheses combined with Anderson's RVB pseudogap theory, forming an effective Hamiltonian that explains key features of high-temperature superconductivity in copper oxides.

Findings

Explains the dome-shaped Tc phase diagram.

Accounts for higher Tc in copper oxide superconductors.

Provides a theoretical basis for the pseudogap state as an RVB state.

Abstract

To explain the high-temperature superconductivity of hole-doped copper-oxide high-temperature superconductors (HDCO-HTSCs), Anderson proposed a theory: (A) the pseudogap state is a resonating valence-bond (RVB) state below T* and (B) the RVB state translates itself into high-temperature superconducting state below Tc. In this paper we abandon Anderson theory B but still retain Anderson theory A and add three new hypotheses. Jointed three hypotheses with Anderson theory A, we construct an effective Hamiltonian of HDCO-HTSCs and explain why Tc-line is a dome in phase diagram and why HDCO-HTSCs have a higher Tc than that of conventional superconductors.