True 3-D displays for avionics and mission crewstations
Elizabeth A. Sholler, Frederick M. Meyer, et al.
SPIE AeroSense 1997
In GaAs/AlxGa1-xAs coupled four-ring and two-ring samples, large Aharonov-Bohm (AB) oscillations have been observed for magnetic fields 0<B<4.5 T. The oscillation spectrum changes systematically corresponding to the subband (Landau level) population inside the one-dimensional channels. Multiple tunneling between the edge states encircling the lithographically defined islands causes well-resolved high harmonics ne/h of the fundamental Aharonov-Bohm oscillation frequency with n≤8. Such high harmonics indicate participation from several islands and require very long phase coherence lengths lφ. The frequencies fn=ne/h of all harmonics decrease with increasing B in accord with a simple model. These findings are evidence for ballistic transport in these large complex devices. The B dependence of the quantum interference amplitudes Gn(B) for AB oscillations of frequency ne/h is qualitatively different from the previously published results: They increase by about an order of magnitude with increasing B before decaying at very high field. The increase in Gn(B) is exploited to infer lφ and indicates that lφ(B) increases with B at a rate 1.3 μm/T. © 1994 The American Physical Society.
Elizabeth A. Sholler, Frederick M. Meyer, et al.
SPIE AeroSense 1997
I.K. Pour, D.J. Krajnovich, et al.
SPIE Optical Materials for High Average Power Lasers 1992
Shiyi Chen, Daniel Martínez, et al.
Physics of Fluids
Thomas E. Karis, C. Mark Seymour, et al.
Rheologica Acta