Analysis of the two dimensional Datta-Das Spin Field Effect Transistor

TL;DR

This paper derives an analytical expression for conductance modulation in a 2D Datta-Das SPINFET and finds discrepancies with experimental observations, questioning the validity of recent claims of successful demonstration.

Contribution

It provides a new analytical model for 2D SPINFET conductance and critically compares it with experimental data, highlighting inconsistencies.

Findings

Derived an analytical conductance expression for 2D SPINFET

Observed poor match between theory and recent experiments

Questioned the claimed demonstration of 2D SPINFET

Abstract

An analytical expression is derived for the conductance modulation of a ballistic two dimensional Datta-Das Spin Field Effect Transistor (SPINFET) as a function of gate voltage. Using this expression, we show that the recently observed conductance modulation in a two-dimensional SPINFET structure does not match the theoretically expected result very well. This calls into question the claimed demonstration of the SPINFET and underscores the need for further careful investigation.