Hg-Based Superconducting Cuprates: High Tc and Pseudo Spin-Gap

TL;DR

This paper reviews microscopic studies of Hg-based high-Tc cuprate superconductors, focusing on the pseudo spin-gap, antiferromagnetic fluctuations, and mechanisms of high-temperature superconductivity using NMR and structural analysis.

Contribution

It provides a comprehensive review of experimental findings on the pseudo spin-gap and magnetic fluctuations in Hg-based cuprates, highlighting their role in high Tc mechanisms.

Findings

Identification of the pseudo spin-gap in Hg-based cuprates

Observation of antiferromagnetic spin fluctuations near quantum critical point

Correlation between crystal structure and superconducting properties

Abstract

A brief review of microscopic studies of high-Tc superconductors HgBa2CuO4+d and HgBa2CaCu2O6+d is presented. The topics concerned are the pseudo spin-gap, the antiferromagnetic spin fluctuations near the quantum critical point, and the mechanism of the high Tc via NMR. The crystal structure with the flat CuO2 plane, two-dimensional electrical resistivity, Cu NQR, NMR experimental results are discussed.