A magnetic barrier in confined two-dimensional electron gases: Nanomagnetometers and magnetic switches

Details A magnetic barrier in confined two-dimensional electron gases: Nanomagnetometers and magnetic switches A magnetic barrier in confined two-dimensional electron gases: Nanomagnetometers and magnetic switches

2000-09-11

arxiv.org/abs/cond-mat/0009155v1

Appl. Phys. Lett. 77, 3215 (2000).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 5 figures included, to be published in Applied Physics Letters

Scientific paper

10.1063/1.1325396

We investigate the conductance properties of a hybrid ferromagnet-semiconductor structure consisting of a confined two-dimensional electron gas and a transverse ferromagnetic strip on top. Within the framework of the Landauer-B\"uttiker model, we develop an alternative way to consider magnetic fields. Our method describes devices ranging from a recently realized nanomagnetometer down to quasi one-dimensional quantum wires. We provide a rigorous way to relate the measured resistance to the actual magnetization of the strip. Regarding the quasi one-dimensional wires we propose a new device application, a tunable magnetic switch.

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