%0 Journal Article %@ 0031-9007 %A Graham, AC %A Simmons, MY %A Ritchie, DA %A Pepper, M %D 2008 %F discovery:1314489 %I AMER PHYSICAL SOC %J PHYS REV LETT %K QUANTUM WIRES, ELECTRON-GAS, POLARIZATION, INSTABILITY %N 22 %T Anticrossing of spin-split subbands in quasi-one-dimensional wires %U https://discovery.ucl.ac.uk/id/eprint/1314489/ %V 100 %X 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, B-parallel to. 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. %Z © 2008 The American Physical Society