Reentrant Metallic Behavior of Graphite in the Quantum Limit

TL;DR

This study investigates the reentrant metallic behavior of graphite under high magnetic fields, suggesting quantum Hall effects and Landau-level-induced superconductivity as underlying mechanisms in the quantum limit.

Contribution

It provides experimental evidence of reentrant metallic behavior in graphite and links it to quantum Hall effects and superconducting correlations at high magnetic fields.

Findings

Reentrant metallic behavior observed in graphite at high magnetic fields.

Quantum Hall effect and Landau-level-quantization-induced superconductivity are relevant.

High-quality graphite samples exhibit these phenomena in the quantum limit.

Abstract

Magnetotransport measurements performed on several well-characterized highly oriented pyrolitic graphite and single crystalline Kish graphite samples reveal a reentrant metallic behavior in the basal-plane resistance at high magnetic fields, when only the lowest Landau levels are occupied. The results suggest that the quantum Hall effect and Landau-level-quantization-induced superconducting correlations are relevant to understand the metallic-like state(s) in graphite in the quantum limit.