Detection of spin polarized currents in quantum point contacts via transverse electron focusing

Details Detection of spin polarized currents in quantum point contacts via transverse electron focusing Detection of spin polarized currents in quantum point contacts via transverse electron focusing

2006-12-20

arxiv.org/abs/cond-mat/0612528v1

Phys. Rev. B 75, 085321 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 5 figures

Scientific paper

10.1103/PhysRevB.75.085321

It has been predicted recently that an electron beam can be polarized when it flows adiabatically through a quantum point contact in a system with spin-orbit interaction. Here, we show that a simple transverse electron focusing setup can be used to detect such polarized current. It uses the amplitude's asymmetry of the spin-split transverse electron focusing peak to extract information about the electron's spin polarization. On the other hand, and depending on the quantum point contact geometry, including this one-body effect can be important when using the focusing setup to study many-body effects in quantum point contacts.

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