1. Spontaneous spin polarization in quantum point contacts.
- Author
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Rokhinson, L. P., Pfeiffer, L. N., and West, K. W.
- Subjects
- *
QUANTUM theory , *ELECTRIC conductivity , *POLARIZATION (Electricity) , *CONDUCTION bands , *PHYSICS - Abstract
We investigate ballistic transport in quantum point contacts fabricated from high mobility two-dimensional hole gas. At low temperatures conductance quantization in units of 2e2/h is observed. Incorporation of point contacts into a magnetic focusing device allows us to measure relative population of the spin subbands. While both subbands are found to be equally populated at the 2e2/h plateau, there is a finite polarization when conductance is < 2e2/h. Polarization is stronger in samples with well defined “0.7 structure”. © 2007 American Institute of Physics [ABSTRACT FROM AUTHOR]
- Published
- 2007
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