Work

Fluctuation-Induced Giant Magnetoresistance in Charge-Neutral Graphene

Year: 2026

Type: article

Abstract: The Johnson-Nyquist noise associated with the intrinsic conductivity of the electron liquid induces fluctuations of the electron density in charge-neutral graphene devices. In the presence of external electric and magnetic fields, the fluctuations of charge density and electric current induce a fluctuating hydrodynamic flow. We show that the resulting advection of charge produces a fluctuation contribution to the macroscopic conductivity of the system, σ_{fl}, and develop a quantitative theory of σ_{fl}. At zero magnetic field, σ_{fl} diverges logarithmically with the system size and becomes rapidly suppressed at relatively small fields. This results in giant magnetoresistance of the system.

Source: Physical Review Letters

DOI: 10.1103/12ft-16kb

Authors: A. Levchenko, E. Kirkinis, A. V. Andreev

Institutions: University of Wisconsin–Madison, Northwestern University, University of Washington

Language: English

Topic: Graphene research and applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green