Normal state Nernst effect, semiconducting-like resistivity and diamagnetism of underdoped cuprates

TL;DR

This paper presents a model explaining the normal state properties of underdoped cuprates, including the Nernst effect, diamagnetism, and resistivity, as phenomena occurring above the superconducting transition temperature.

Contribution

It introduces a model with the chemical potential near the mobility edge that quantitatively accounts for various normal state properties of underdoped cuprates.

Findings

The model explains the Nernst effect and diamagnetism in underdoped cuprates.

Resistivity behavior is consistent with the model's predictions.

Normal state phenomena are described without invoking residual superconductivity.

Abstract

Semiconducting-like low-temperature in-plane resistivity indicates that there are no remnants of superconductivity above the resistive phase transition at T > Tc in underdoped cuprates. The model with the chemical potential pinned near the mobility edge inside the charge-transfer optical gap describes quantitatively the Nernst effect, thermopower, diamagnetism and the unusual low-temperature resistivity of underdoped cuprates as normal state phenomena above Tc.