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Anomalous Negative Magnetoresistance Caused by Non-Markovian Effects | | Vadim V. Cheianov
; A.P. Dmitriev
; V.Yu. Kachorovskii
; | | Date: |
28 Mar 2003 | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | 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
ho_{xx}/
ho sim - (omega_c au)^2 / n a^2.$ With increasing field the magnetoresistance becomes linear $delta
ho_{xx}/
ho sim - omega_c au $ in a good agreement with the experiment and numerical simulations. | | Source: | arXiv, cond-mat/0303616 | | Services: | Forum | Review | PDF | Favorites | |
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