Detection of spin polarization in quantum point contacts

Author

• Leonid P. Rokhinson, Birck Nanotechnology Center, Purdue UniversityFollow
• Loren N. Pfeiffer, Lucent Technologies, Bell Labs
• Kenw W. West, Lucent Technologies, Bell Labs

Abstract

We use spatial spin separation by a magnetic focusing technique to probe the polarization of quantum point contacts. The point contacts are fabricated from p-type GaAs/AlGaAs heterostructures. A finite polarization is measured in the low density regime, when the conductance of a point contact is tuned to < 2e(2)/h. Polarization is stronger in samples with a well defined '0.7 structure'.

Date of this Version

4-23-2008

Recommended Citation

Rokhinson, Leonid P.; Pfeiffer, Loren N.; and West, Kenw W., "Detection of spin polarization in quantum point contacts" (2008). Birck and NCN Publications. Paper 172.
https://docs.lib.purdue.edu/nanopub/172