title: Anticrossing of spin-split subbands in quasi-one-dimensional wires.
abstract: In quantum Hall systems, both anticrossings and magnetic phase transitions can occur when opposite-spin Landau levels coincide. Our results indicate that both processes are also possible in quasi-1D quantum wires in an in-plane B field, Bparallel. Crossings of opposite-spin 1D subbands resemble magnetic phase transitions at zero dc source-drain bias, but display anticrossings at high dc bias. Our data also imply that the well-known 0.7 structure may evolve into a spin-hybridized state in finite dc bias.
authors.affiliation: Cavendish Laboratory, J. J. Thomson Avenue, Cambridge, CB3 OHE, United Kingdom.
authors.forename: A C
authors.initials: AC
authors.lastname: Graham
authors.forename: M Y
authors.initials: MY
authors.lastname: Simmons
authors.forename: D A
authors.initials: DA
authors.lastname: Ritchie
authors.forename: M
authors.initials: M
authors.lastname: Pepper