Magnetization, thermoelectric, and pressure studies of the magnetic field-induced metal to insulator transition in tau phase organic conductors

TL;DR

This study explores the magnetic field-induced metal-insulator transition in tau-phase organic conductors, revealing a bulk thermodynamic process involving a magnetic field-dependent gap and changes in electronic structure.

Contribution

It provides comprehensive experimental evidence for the thermodynamic nature and electronic structure changes during the transition in tau-phase organic conductors.

Findings

Transition occurs above 35 T and below 14 K

A magnetic field-dependent gap opens in the insulating state

Transition involves a change in electronic structure

Abstract

We have investigated the magnetic field-induced metal-insulator transition in the tau-phase organic conductors, which occurs in fields above 35 T, and below 14 K, by magnetization, thermoelectric, and pressure dependent transport methods. Our results show that the transition is a bulk thermodynamic process where a magnetic field-dependent gap opens upon entry into the insulating state. We argue that the transition involves a magnetic field-induced change in the electronic structure.