5 papers · 1 filter
Nonmonotonic temperature dependence of the thermopower of atomic-size gold contacts
Thomas B. Möller, Marcel Strohmeier, Johannes Boneberg +3
We report measurements of the thermopower of atomic-size gold contacts realized by the mechanically controllable break junction (MCBJ) technique over a temperature range from 18 K…
Topography-based navigation in a millikelvin scanning tunneling microscope using binary-encoded position markers
R. Fischer-SüÃlin, R. Hartmann, T. Kandra +1
We present a compact millikelvin scanning tunneling microscope (STM) operating at 270mK with topographic navigation to micron-scale targets. Two piezoelectric low-temperature nanop…
Spin-polarized transport in copper-oxide atomic junctions revealed by anomalous shot-noise behavior in presence of the Kondo effect
Marcel Strohmeier, Samanwita Biswas, Wolfgang Belzig +2
Noise measurements provide a valuable tool for revealing spin polarization effects in the electronic transport through quantum coherent conductors. We present an extension of the L…
Benchmarking Current-to-Voltage Amplifiers for Quantum Transport Measurements
J. Escorza, G. Pellicer, T. de Ara +4
Accurate electrical amplification is essential in molecular electronics for measuring conductance through atomic and molecular junctions, where currents often span several orders o…
Imaging of Gate-Controlled Suppression of Superconductivity via the Meissner Effect
P. J. Scheidegger, K. J. Knapp, U. Ognjanovic +5
It was recently discovered that supercurrents flowing through thin superconducting nanowires can be quenched by a gate voltage. This gate control of supercurrents, known as the GCS…