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Influence of spin dynamics of defects on weak localization in paramagnetic 2D metals | | Oleksiy Kashuba
; Leonid I. Glazman
; Vladimir I. Fal'ko
; | | Date: |
7 Sep 2015 | | Abstract: | Spin-flip scattering of charge carriers in metals with magnetic defects leads
to the low-temperature saturation of the decoherence time, $ au_varphi$, of
electrons at the value comparable to their spin relaxation time, $ au_s$. In
two-dimensional (2D) conductors such a saturation can be lifted by an in-plane
magnetic field, $B_parallel$, which polarizes spins of scatterers without
affecting orbital motion of free carriers. Here, we show that in 2D conductors
with substantially different values of the g-factors of electrons ($g_e$) and
magnetic defects ($g_i$), the decoherence time $ au_varphi(B_parallel)$
(reflected by the curvature of magnetoconductance) displays an anomaly: it
first gets shorter, decaying on the scale $B_parallelsim hbar/|g_i-g_e|mu_B
au_s$, before becoming longer at higher values of $B_parallel$. | | Source: | arXiv, 1509.1955 | | Services: | Forum | Review | PDF | Favorites | |
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