Fluctuation-Induced Giant Magnetoresistance in Charge-Neutral Graphene
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.
Fields of Study & Subjects
Graphene research and applications
Quantum and electron transport phenomena
Topological Materials and Phenomena
Publication details
- Journal / source
- Physical Review Letters
- Volume
- 136
- Issue
- 12
- Pages
- 126301–126301
- Publication date
- 5 March 2026
- Language
- EN