تقرير
Nonmonotonous classical magneto-conductivity of a two-dimensional electron gas in a disordered array of obstacles
| العنوان: | Nonmonotonous classical magneto-conductivity of a two-dimensional electron gas in a disordered array of obstacles |
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| المؤلفون: | Siboni, N. H., Schluck, J., Pierz, K., Schumacher, H. W., Kazazis, D., Horbach, J., Heinzel, T. |
| المصدر: | Phys. Rev. Lett. 120, 056601 (2018) |
| سنة النشر: | 2017 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Disordered Systems and Neural Networks, Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | Magnetotransport measurements in combination with molecular dynamics (MD) simulations on two-dimensional disordered Lorentz gases in the classical regime are reported. In quantitative agreement between experiment and simulation, the magnetoconductivity displays a pronounced peak as a function of perpendicular magnetic field $B$ which cannot be explained in the framework of existing kinetic theories. We show that this peak is linked to the onset of a directed motion of the electrons along the contour of the disordered obstacle matrix when the cyclotron radius becomes smaller than the size of the obstacles. This directed motion leads to transient superdiffusive motion and strong scaling corrections in the vicinity of the insulator-to-conductor transitions of the Lorentz gas. Comment: 5 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.120.056601 |
| URL الوصول: | http://arxiv.org/abs/1708.01039 |
| رقم الأكسشن: | edsarx.1708.01039 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.120.056601 |
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