Magnetotransport properties of strained (Ga0.95, Mn0.05)As epilayers close to the metal-insulator transition: Description using Aronov-Altshuler three-dimensional scaling theory - Condensed Matter > Other Condensed MatterReportar como inadecuado




Magnetotransport properties of strained (Ga0.95, Mn0.05)As epilayers close to the metal-insulator transition: Description using Aronov-Altshuler three-dimensional scaling theory - Condensed Matter > Other Condensed Matter - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: The magnitude of the anisotropic magnetoresistance (AMR) and the longitudinalresistance in compressively strained (Ga0.95, Mn0.05)As epilayers were measuredfor the first time down to temperatures as low as 30 mK. Below temperatures of3K the conductivity decreases ~ T^1-3 over two orders of magnitude intemperature. The conductivity can be well described within the framework of a3D scaling theory of Anderson-s transition in the presence of spin scatteringin semiconductors. It is shown that the samples are on the metallic side butvery close to the metal-insulator transition (MIT). At lowest temperatures adecrease in the AMR effect is observed, which is assigned to changes in thecoupling between the remaining itinerant carriers and the local Mn 5-2-spinmoments.



Autor: J. Honolka, S. Masmanidis, H.X. Tang, D.D. Awschalom, M.L. Roukes

Fuente: https://arxiv.org/







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