Current-current Fermi-liquid corrections to the superconducting fluctuations on conductivity and diamagnetism

TL;DR

This paper investigates how current-current interactions influence superconducting fluctuations in conductivity and diamagnetism, revealing a suppression of conductivity fluctuations near a Mott-insulating phase, aligning with experimental observations in cuprates.

Contribution

It provides a theoretical analysis of superconducting-fluctuation corrections considering current-current interactions, highlighting their effects near Mott-insulating phases.

Findings

Suppression of fluctuation conductivity near Mott insulators

Enhanced diamagnetic fluctuations compared to conductivity

Agreement with experimental data on underdoped cuprates

Abstract

We analyze the behavior of the superconducting-fluctuations contribution to diamagnetism and conductivity in a model system having current-current interactions. We show that in proximity to a Mott-insulating phase one recovers an overall suppression of the fluctuating contribution to the conductivity with respect to diamagnetism, in close analogy with recent experiments on the underdoped phase of cuprate superconductors.