Spin Transport in a Quantum Hall Insulator

A novel experimental optical method, based on photoluminescence and photo-induced resonant reflection techniques, is used to investigate the spin transport over long distances in a new, recently discovered collective state—magnetofermionic condensate. The given Bose–Einstein condensate exists purely fermionic system (ν = 2 quantum Hall insulator) due presence of non-equilibrium ensemble spin-triplet magnetoexcitons—composite bosons. It found that can spread macroscopically approximately 200 μm. propagation velocity long-lived excitations measured be 25 m/s.