Spin dependent quantum transport effects in Cu nanowires

Details Spin dependent quantum transport effects in Cu nanowires Spin dependent quantum transport effects in Cu nanowires

2003-03-07

arxiv.org/abs/cond-mat/0303135v2

Journal of Physics: Condensed Matter 15 (2003) L291-6

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 4 figures; added references and removed typos

Scientific paper

10.1088/0953-8984/15/19/104

In this work we investigate quantum transport in Cu nanowires created by bringing macroscopic Cu wires into and out of contact under an applied magnetic field in air. Here we show that a 70 % magneto-conductance effect can be seen in a Cu nanowire in a field of 2 mT at room temperature. We propose that this phenomenon is a consequence of spin filtering due to the adsorption of atmospheric oxygen modifying the electronic band structure and introducing spin split conduction channels. This is a remarkable result since bulk Cu is not magnetic and it may provide a new perspective in the quest for spintronic devices.

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