Anomalous Negative Magnetoresistance Caused by Non-Markovian Effects

Abstract

A theory of recently discovered anomalous low-field magnetoresistance is developed for the system of two-dimensional electrons scattered by hard disks of radius $a,$ randomly distributed with concentration $n.$ For small magnetic fields the magentoresistance is found to be parabolic and inversely proportional to the gas parameter, $\delta {\rho }_{xx}/\rho \sim -({\omega }_c\tau {)}^2/n{a}^2.$ With increasing field the magnetoresistance becomes linear $\delta {\rho }_{xx}/\rho \sim -{\omega }_c\tau$ in a good agreement with the experiment and numerical simulations.

4 pages RevTeX, 5 figures

References in corpus (5)

• Quasiclassical negative magnetoresistance of a 2D electron gas: interplay of strong scatterers and smooth disorder
• Quasiclassical magnetotransport in a random array of antidots
• Classical mechanism for negative magnetoresistance in two dimensions
• Anomalous Low-Field Classical Magnetoresistance in Two Dimensions
• Cyclotron resonance in antidot arrays

Cited by in corpus (9)

• Non-Markovian Effects on the Two-Dimensional Magnetotransport: Low-field Anomaly in Magnetoresistance
• Magnetotransport of electrons in quantum Hall systems
• Non-monotonic magnetoresistance of two-dimensional electron systems in the ballistic regime
• Classical memory effects on spin dynamics in two-dimensional systems
• Sharp Magnetic Field Dependence of the 2D Hall Coefficient Induced by Classical Memory Effects
• Tunable magnetoresistance behavior in suspended graphitic multilayers through ion implantation
• Non-Boltzmann classical correction to the velocity auto-correlation function for isotropic scattering in two dimensions
• Magnetic field influenced electron-impurity scattering and magnetotransport
• Quantum phase coherence in non-Markovian and reaction-diffusive transport