Possible propagation of the Zhang-Rice singlet as a probable Cooper channel in the $CuO_2$ planes

TL;DR

This paper proposes a simplified variational approach to model the Zhang-Rice singlet in cuprate planes, suggesting its potential role as a Cooper pairing channel in high-temperature superconductivity.

Contribution

It introduces a new formation of the Zhang-Rice singlet as the ground state in a single-band t-J model, exploring its propagation as a possible mechanism for superconductivity.

Findings

ZRS can be modeled as the ground state in a simplified t-J framework.

Propagation of ZRS as a Cooper channel is demonstrated.

Provides a phenomenological perspective on high-Tc superconductivity mechanisms.

Abstract

The issue of how superconductivity originate in the $CuO_2$ planes believed to be crucial to understanding the high $T_c$ superconducting cuprates is still an going debate. In the wake of recent experimental observations of the the Zhang-Rice singlet (ZRS), its formation and propagation need to be revisited especially by using a simple approach almost at a phenomenological level. Within a highly simplified correlated variational approach (HSCVA) in this paper, a new formation of the ZRS as constituting the ground state of a single-band t-J model of the $CuO_2$ planes is developed. This formation is then used to demonstrate how the ZRS can be propagated as a probable Cooper channel in the $CuO_2$ planes.