Effect of Disorder on the Conductance of Spin Field Effect Transistors (SPINFET)

Preprint English OPEN
Cahay, M. ; Bandyopadhyay, S. (2003)
  • Subject: Condensed Matter - Mesoscale and Nanoscale Physics
    arxiv: Condensed Matter::Mesoscopic Systems and Quantum Hall Effect

We show that the conductance of Spin Field Effect Transistors (SPINFET) [Datta and Das, Appl. Phys. Lett., Vol. 56, 665 (1990)] is affected by a single (non-magnetic) impurity in the transistor's channel. The extreme sensitivity of the amplitude and phase of the transistor's conductance oscillations to the location of a single impurity in the channel is reminiscent of the phenomenon of universal conductance fluctuations in mesoscopic samples and is extremely problematic as far as device implementation is concerned.
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