4 papers
Origin of enhanced dynamic nuclear polarization and all-optical nuclear magnetic resonance in GaAs quantum wells
G. Salis, D. D. Awschalom, Y. Ohno +1
Time-resolved optical measurements of electron-spin dynamics in a (110) GaAs quantum well are used to study the consequences of a strongly anisotropic electron g-tensor, and the or…
Optical manipulation of nuclear spin by a two-dimensional electron gas
G. Salis, D. T. Fuchs, J. M. Kikkawa +3
Conduction electrons are used to optically polarize, detect and manipulate nuclear spin in a (110) GaAs quantum well. Using optical Larmor magnetometry, we find that nuclear spin c…
Magnetotransport properties of (Ga,Mn)As investigated at low temperature and high magnetic field
T. Omiya, F. Matsukura, T. Dietl +4
Magnetotransport properties of ferromagnetic semiconductor (Ga,Mn)As have been investigated. Measurements at low temperature (50 mK) and high magnetic field (<= 27 T) have been emp…
Phase Transition in ν=2 Bilayer Quantum Hall State
A. Sawada, Z. F. Ezawa, H. Ohno +6
The Hall-plateau width and the activation energy were measured in the bilayer quantum Hall state at filling factor ν=2, 1 and 2/3, by changing the total electron density and the de…