Interactions, disorder and local defects in graphite

TL;DR

This paper explores how disorder and interactions in graphene can lead to various phases, including ferromagnetism and superconductivity, with local defects potentially explaining observed magnetic signals.

Contribution

It demonstrates that the interplay of disorder and interactions in 2D graphene results in a complex phase diagram with stable strong coupling phases, highlighting the role of local defects.

Findings

Disorder and interactions induce a rich phase diagram in graphene.

Local defects can account for ferromagnetic signals.

Strong coupling phases become stable due to interplay of disorder and interactions.

Abstract

Recent experiments report the existence of ferromagnetic and superconducting fluctuations in graphite at unexpectedly high temperatures. The interplay of disorder and interactions in a 2D graphene layer is shown to give rise to a rich phase diagram where strong coupling phases can become stable. Local defects can explain the ferromagnetic signals.