The attraction between antiferromagnetic quantum vortices as origin of superconductivity in cuprates
Abstract
We propose as key of superconductivity in (hole-doped) cuprates a novel excitation of magnetic origin, characteristic of two-dimensions and of purely quantum nature: the antiferromagnetic spin vortices. In this formalism the charge pairing arises from a Kosterlitz-Thouless-like attraction between such vortices centered on opposite N\'eel sublattices. This charge pairing induces also the spin pairing through the action of a gauge force generated by the no-double occupation constraint imposed in the t-J model of the CuO planes of the cuprates. Superconductivity arises from coherence of pairs of excitations describing Zhang-Rice singlets and it is not of standard BCS type. We show that many experimental features of the cuprates can find a natural explanation in this formalism.
Keywords
Cite
@article{arxiv.1806.00280,
title = {The attraction between antiferromagnetic quantum vortices as origin of superconductivity in cuprates},
author = {P. A. Marchetti},
journal= {arXiv preprint arXiv:1806.00280},
year = {2018}
}
Comments
Based on a talk given at the "Workshop on Topological Phase Transitions and New Developments" Nanyang Technological University, Singapore 5-8 July 2017; to appear in the Proceedings