De Haas-van Alphen effect in graphene

TL;DR

This paper demonstrates the first observation of the de Haas-van Alphen effect in graphene by using a novel mechanical resonance detection scheme involving a graphene Corbino disk supported by a gold resonator, which is broadly applicable to 2D materials.

Contribution

It introduces a new mechanical resonance-based method to detect the de Haas-van Alphen effect in 2D materials, including graphene, independent of the material.

Findings

First evidence of dHvA effect in massless Dirac fermions (graphene)

Resonance frequency dependence on magnetic field indicative of dHvA effect

Method applicable to various 2D conducting materials

Abstract

In our work, we study the dynamics of a graphene Corbino disk supported by a gold mechanical resonator in the presence of a magnetic field. We demonstrate here that our graphene/gold mechanical structure exhibits a nontrivial resonance frequency dependence on the applied magnetic field, showing how this feature is indicative of the de Haas-van Alphen effect in the graphene Corbino disk. Our findings are the first evidence of dHvA effect for massless Dirac fermions. By relying on the mechanical resonances of the Au structure, our detection scheme is essentially independent of the material considered and can be applied for dHvA measurements on any conducting 2D material. In particular, the scheme is expected to be an important tool in studies of centrosymmetric transition metal dichalcogenides (TMDs) crystals, shedding new light on hidden magnetization and interaction effects.