Direct observation of non-equilibrium spin population in quasi-one-dimensional nanostructures
arXiv:1007.2138 · doi:10.1021/nl903314j
Abstract
Observation of the interplay between interacting energy levels of two spin species is limited by the difficulties in continuously tracking energy levels, and thus leaves spin transport in quantum wires still not well understood. We present a dc conductance feature in the non-equilibrium transport regime, a direct indication that the first one-dimensional subband is filled mostly by one spin species only. How this anomalous spin population changes with magnetic field and source-drain bias is directly measured. We show the source-drain bias changes spin polarisation in semiconductor nanowires, providing a fully electrical method for the creation and manipulation of spin polarization as well as spin-polarized currents.
arXiv comment5 pages, 4 figures
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Cited by in corpus (6)
- What lurks below the last plateau: Experimental studies of the 0.7 x 2e^2/h conductance anomaly in one-dimensional systems
- All-electrical injection and detection of a spin polarized current using 1D conductors
- Spin fluctuations in the 0.7-anomaly in quantum point contacts
- Quantised conductance of one-dimensional strongly-correlated electrons in an oxide heterostructure
- Conductance quantization and shot noise of a double-layer quantum point contact
- Tracking the energies of one-dimensional subband edges in quantum point contacts using dc conductance measurements