231 citations · 518 across the 8 of their papers we have counts for
8 papers
Shot-noise and conductance measurements of transparent superconductor / two-dimensional electron gas junctions
B. -R. Choi, A. E. Hansen, T. Kontos +6
We have measured the conductance and shot-noise of superconductor-normal metal (S-N) junctions between a Niobium (Nb) film and a 2-dimensional electron gas (2DEG), formed in an InA…
Temperature induced shift in the pinch-off voltage of mesoscopic devices
A. E. Hansen, A. Kristensen, H. Bruus
Detailed experimental studies of the conductance of mesoscopic GaAs devices in the few-mode regime reveal a novel thermal effect: for temperatures up to at least 10 K the measured…
Temperature dependent deviations from ideal quantization of plateau conductances in GaAs quantum point contacts
A. E. Hansen, A. Kristensen, H. Bruus
We present detailed experimental studies of the temperature dependence of the plateau conductance of GaAs quantum point contacts in the temperature range from 0.3 K to 10 K. Due to…
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…
Bias and temperature dependence of the 0.7 conductance anomaly in Quantum Point Contacts
A. Kristensen, H. Bruus, A. E. Hansen +8
The 0.7 (2e^2/h) conductance anomaly is studied in strongly confined, etched GaAs/GaAlAs quantum point contacts, by measuring the differential conductance as a function of source-d…
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…