Spin separation in cyclotron motion.
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.
Rokhinson
L P
LP
Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA. leonid@physics.purdue.edu
Larkina
V
V
Lyanda-Geller
Y B
YB
Pfeiffer
L N
LN
West
K W
KW