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Energy gap of topological surface states in proximity to a magnetic insulator
Jiashu Wang, Tianyi Wang, Mykhaylo Ozerov +14
Topological surface-states can acquire an energy gap when time-reversal symmetry is broken by interfacing with a magnetic insulator. This gap has yet to be measured. Such topologic…
Light-Activated Nuclear Spin Polarization in Dilute Ferromagnetic (Ga,Mn)As
John T. Tokarski, Clifford R Bowers, Sunil K. Thapa +5
We study light-induced nuclear spin-polarization in a thin film of Ga1-xMnxAs (x 0.04), a dilute ferromagnetic semiconductor, grown on a GaAs substrate. High-field inductively-dete…
Collective magnetization dynamics in ferromagnetic (Ga,Mn)As mediated by photo-excited carriers
Hang Li, Xinyu Liu, Ying-Yuan Zhou +2
We present a study of photo-excited magnetization dynamics in ferromagnetic (Ga,Mn)As films observed by time-resolved magneto-optical measurements. The magnetization precession tri…
Observation of the fractional ac Josephson effect: the signature of Majorana particles
Leonid P. Rokhinson, Xinyu Liu, Jacek K. Furdyna
Topological superconductors which support Majorana fermions are thought to be realized in one-dimensional semiconducting wires coupled to a superconductor. Such excitations are exp…