Abstract
We present transverse electron focusing measurements in the two dimensional electrons gas formed at the interface of a GaAs/AlGaAs heterostructure. The experimental arrangement consists of two orthogonal quantum point contacts (QPCs), one acting as injector and the other as detector of the collimated 1D electrons as a function of transverse magnetic field. The focusing spectrum shows anomalous behaviour, the first and third focusing peaks split into two sub-peaks while second peak remains as a single peak. The observed splitting, a signature of spin states, arises from the spin-orbit interaction when the 1D electrons are injected into the 2D regime, thus allowing us to manipulate the spin states within the 1D channel.
Highlights
Published under licence by IOP Publishing Ltd the transconductance dG dVsg as a function of dc source-drain bias, where
Electrons in a quantum wire are spin degenerate, but spin polarisation becomes observable on the application of a large in-plane magnetic field[1]
A typical transverse electron focusing setup consists of an injector and a detector, generally along a plane such that on application of a small perpendicular magnetic field (B⊥) the electrons will exhibit cyclotron motion[9, 10]
Summary
Published under licence by IOP Publishing Ltd the transconductance dG dVsg as a function of dc source-drain bias, where. Electrons in a quantum wire are spin degenerate, but spin polarisation becomes observable on the application of a large in-plane magnetic field[1].
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