Engineering magnetoresistance: a new perspective. (12th June 2019)

• Record Type: Journal Article
• Authors: Patra, Moumita; Maiti, Santanu K; Sil, Shreekantha
• Is Part Of: Journal of physics. Volume 31:Number 35(2019)
• Publication Date: 2019-06-12
• Subjects: giant magnetoresistance -- dephasing effect -- externally controlled GMR -- AAH spacer; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/ab2294
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: 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.