title: Spin separation in cyclotron motion.
abstract: Charged carriers with different spin states are spatially separated in a two-dimensional hole gas. Because of strong spin-orbit interaction, holes at the Fermi energy in GaAs have different momenta for two possible spin states traveling in the same direction, and, correspondingly, different cyclotron orbits in a weak magnetic field. Two point contacts, acting as a monochromatic source of ballistic holes and a narrow detector arranged in the magnetic focusing geometry are demonstrated to work as a tunable spin filter.
authors.affiliation: Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA. leonid@physics.purdue.edu
authors.forename: L P
authors.initials: LP
authors.lastname: Rokhinson
authors.forename: V
authors.initials: V
authors.lastname: Larkina
authors.forename: Y B
authors.initials: YB
authors.lastname: Lyanda-Geller
authors.forename: L N
authors.initials: LN
authors.lastname: Pfeiffer
authors.forename: K W
authors.initials: KW
authors.lastname: West