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Spin-polarized localization in a magnetized chain
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Benini, Leonardo, Mukherjee, Amrita, Chakrabarti, Arunava and Römer, Rudolf A. (2019) Spin-polarized localization in a magnetized chain. Scientific Reports, 9 . 5930 . doi:10.1038/s41598-019-42316-5 ISSN 2045-2322.
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Official URL: https://doi.org/10.1038/s41598-019-42316-5
Abstract
We investigate a simple tight-binding Hamiltonian to understand the stability of spin-polarized transport of states with an arbitrary spin content in the presence of disorder. The general spin state is made to pass through a linear chain of magnetic atoms, and the localization lengths are computed. Depending on the value of spin, the chain of magnetic atoms unravels a hidden transverse dimensionality that can be exploited to engineer energy regimes where only a selected spin state is allowed to retain large localization lengths. An analysis is carried out to understand the roles played by the spin projections in different energy regimes of the range of states. We introduce a new measure, viz, a spin-resolved localization length for this purpose. We study uncorrelated disorder in the potential profile offered by the magnetic substrate or in the orientations of the magnetic moments concerning a given direction in space. Our results show that the spin filtering effect is robust against weak disorder and hence the proposed systems should be good candidates for experimental realizations of spin-selective transport.
Item Type: | Journal Article | |||||||||||||||
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Subjects: | Q Science > QC Physics | |||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||
Library of Congress Subject Headings (LCSH): | Spintronics | |||||||||||||||
Journal or Publication Title: | Scientific Reports | |||||||||||||||
Publisher: | Nature Publishing Group | |||||||||||||||
ISSN: | 2045-2322 | |||||||||||||||
Official Date: | 11 April 2019 | |||||||||||||||
Dates: |
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Volume: | 9 | |||||||||||||||
Article Number: | 5930 | |||||||||||||||
DOI: | 10.1038/s41598-019-42316-5 | |||||||||||||||
Status: | Peer Reviewed | |||||||||||||||
Publication Status: | Published | |||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||
Date of first compliant deposit: | 12 April 2019 | |||||||||||||||
Date of first compliant Open Access: | 12 April 2019 | |||||||||||||||
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