4 papers · 1 filter
Mesoscopic decoherence in Aharonov-Bohm rings
A. E. Hansen, A. Kristensen, S. Pedersen +2
We study electron decoherence by measuring the temperature dependence of Aharonov-Bohm (AB) oscillations in quasi-1D rings, etched in a high-mobility GaAs/GaAlAs heterostructure. T…
Investigation of the Mesoscopic Aharonov-Bohm effect in Low Magnetic Fields
A. E. Hansen, S. Pedersen, A. Kristensen +2
We have investigated the Aharonov-Bohm effect in mesoscopic semiconductor GaAs/GaAlAs rings in low magnetic fields. The oscillatory magnetoconductance of these systems is systemati…
Weak localisation in AlGaAs/GaAs p-type quantum wells
S. Pedersen, C. B. Sorensen, A. Kristensen +3
We have for the first time experimentally investigated the weak localisation magnetoresistance in a AlGaAs/GaAs p-type quantum well. The peculiarity of such systems is that spin-or…
Observation of Quantum Asymmetry in an Aharonov-Bohm Ring
S. Pedersen, A. E. Hansen, A. Kristensen +2
We have investigated the Aharonov-Bohm effect in a one-dimensional GaAs/GaAlAs ring at low magnetic fields. The oscillatory magnetoconductance of these systems are for the first ti…