Topological quantum characteristics observed in the investigation of the conductivity in normal metals |
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Authors: | S. P. Novikov A. Ya. Mal’tsev |
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Affiliation: | (1) Institute for Physical Science and Technology, University of Maryland, College Park, Maryland, 20742-2431;(2) L. D. Landau Institute of Theoretical Physics, Russian Academy of Sciences, 117940 Moscow, Russia |
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Abstract: | It is shown that the investigation of the conductivity in a single crystal of a normal metal with a complicated Fermi surface in strong magnetic fields B can reveal integral topological characteristics which are determined by the topology of open-ended quasiclassical electron trajectories. Specifically, in the case of open-ended trajectories of the general position there always exists a direction η orthogonal to B in which the conductivity approaches zero for large B, and this direction lies in some integral (i.e., generated by two reciprocal-lattice vectors) plane that remains stationary for small variations of the direction of B. Pis’ma Zh. éksp. Teor. Fiz. 63, No. 10, 809–813 (25 May 1996) |
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