Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7920534 | Journal of Physics and Chemistry of Solids | 2018 | 25 Pages |
Abstract
Transverse magnetoresistance of copper single crystals has been measured in the orientation of open-orbit from 2Â K to 20Â K for fields up to 9Â T. The experimental Kohler's plots display deviation between individual curves below 16Â K and overlap in the range of 16Â K-20Â K. The violation of the Kohler's rule below 16Â K indicates that the magnetotransport can not be described by the classical theory of electron transport on spherical Fermi surface with a single relaxation time. A theoretical model incorporating two energy bands, spherical and cylindrical, with different relaxation times has been developed to describe the magnetoresistance data. The calculations show that the electron-phonon scattering rates at belly and neck regions of the Fermi surface have different temperature dependencies, and in general, they do not follow T3 law. The ratio of the relaxation times in belly and neck regions decreases parabolically with temperature as AâCT2, with A and C being constants.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Q. Bian, M. Niewczas,