Engineering magnetoresistance: a new perspective

A new proposal is given to achieve high degree of magnetoresistance (MR) in a magnetic quantum device where two magnetic layers are separated by a non-magnetic (NM) quasiperiodic layer that acts as a spacer. The NM spacer is chosen in the form of well-known Aubry-André or Harper (AAH) model which es...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2019-09, Vol.31 (35), p.355303-355303
Main Authors: Patra, Moumita, Maiti, Santanu K, Sil, Shreekantha
Format: Article
Language:English
Subjects:
AAH spacer
dephasing effect
externally controlled GMR
giant magnetoresistance
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Summary:A new proposal is given to achieve high degree of magnetoresistance (MR) in a magnetic quantum device where two magnetic layers are separated by a non-magnetic (NM) quasiperiodic layer that acts as a spacer. The NM spacer is chosen in the form of well-known Aubry-André or Harper (AAH) model which essentially gives the non-trivial features in MR due to its gaped spectrum and yields the opportunities of controlling MR selectively by tuning the AAH phase externally. We also explore the role of dephasing on magnetotransport to make the model more realistic. Finally, we illustrate the experimental possibilities of our proposed quantum system.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/ab2294