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Electrical control of the sign of the g-factor in a GaAs hole quantum point contact
- Source :
- Phys. Rev. B 94, 041406(R), 2016
- Publication Year :
- 2017
-
Abstract
- Zeeman splitting of 1D hole subbands is investigated in quantum point contacts (QPCs) fabricated on a (311) oriented GaAs-AlGaAs heterostructure. Transport measurements can determine the magnitude of the g-factor, but cannot usually determine the sign. Here we use a combination of tilted fields and a unique off-diagonal element in the hole g-tensor to directly detect the sign of g*. We are able to tune not only the magnitude, but also the sign of the g-factor by electrical means, which is of interest for spintronics applications. Furthermore, we show theoretically that the resulting behavior of g* can be explained by the momentum dependence of the spin-orbit interaction.<br />Comment: 5 pages, 4 figures
- Subjects :
- Condensed Matter - Mesoscale and Nanoscale Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 94, 041406(R), 2016
- Publication Type :
- Report
- Accession number :
- edsarx.1702.08135
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.94.041406