Publications (8)
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…
Dilation of the Giant Vortex State in a Mesoscopic Superconducting Loop
S. Pedersen, G. R. Kofod, J. C. Hollingbery +2
We have experimentally investigated the magnetisation of a mesoscopic aluminum loop at temperatures well below the superconducting transition temperature . The flux quantisa…
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…
Spin-orbit interaction and the 'metal-insulator' transition observed in two-dimensional hole systems
L. E. Golub, S. Pedersen
We present calculations of the spin and phase relaxation rates in GaAs/AlGaAs -type quantum wells. These rates are used to derive the temperature dependence of the weak-localiza…
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…