Spintronics with NSN junction of one-dimensional quantum wires: a study of pure spin current and magnetoresistance

Das, Sourin ; Rao, Sumathi ; Saha, Arijit (2008) Spintronics with NSN junction of one-dimensional quantum wires: a study of pure spin current and magnetoresistance EPL: Europhysics Letters, 81 (6). Article ID 67001. ISSN 0295-5075

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Official URL: http://iopscience.iop.org/article/10.1209/0295-507...

Related URL: http://dx.doi.org/10.1209/0295-5075/81/67001

Abstract

We demonstrate possible scenarios for production of pure spin current and large tunnelling magnetoresistance ratios from elastic co-tunnelling and crossed Andreev reflection across a superconducting junction comprising of normal-metal–superconductor–normal-metal, where, the normal metal is a one-dimensional interacting quantum wire. We show that there are fixed points in the theory which correspond to the case of pure spin current. We analyze the influence of electron-electron interaction and see how it stabilizes or de-stabilizes the production of pure spin current. These fixed points can be of direct experimental relevance for spintronics application of normal-metal–superconductor–normal-metal junctions of one-dimensional quantum wires. We also calculate the power law temperature dependence of the crossed Andreev reflection enhanced tunnelling magnetoresistance ratio for the normal-metal–superconductor–normal-metal junction.

Item Type:Article
Source:Copyright of this article belongs to European Physical Society.
ID Code:109507
Deposited On:01 Feb 2018 05:13
Last Modified:01 Feb 2018 05:13

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