108 citations · 199 across the 8 of their papers we have counts for
8 papers
Quantum dot thermometry at ultra-low temperature in a dilution refrigerator with a He immersion cell
Giorgio Nicolí, Peter Märki, Beat A. Bräm +7
Experiments performed at a temperature of a few millikelvin require effective thermalization schemes, low-pass filtering of the measurement lines and low-noise electronics. Here, w…
Stable Branched Electron Flow
B A Braem, C Gold, S Hennel +6
The pattern of branched electron flow revealed by scanning gate microscopy shows the distribution of ballistic electron trajectories. The details of the pattern are determined by t…
Scanning Gate Microscopy in a Viscous Electron Fluid
Beat A Braem, Francesco M D Pellegrino, Alessandro Principi +10
We measure transport through a Ga[Al]As heterostructure at temperatures between 0.1 K and 30 K. Increasing the temperature enhances the electron-electron scattering rate and viscou…
Investigating Energy Scales of Fractional Quantum Hall States using Scanning Gate Microscopy
Beat A. Braem, Tobias Krähenmann, Szymon Hennel +4
We use the voltage biased tip of a scanning force microscope at a temperature of 35\,mK to locally induce the fractional quantum Hall state of in a split-gate defined const…
Tunnel barrier design in donor nanostructures defined by hydrogen-resist lithography
Nikola Pascher, Szymon Hennel, Susanne Mueller +1
A four-terminal donor quantum dot (QD) is used to characterize potential barriers between degenerately doped nanoscale contacts. The QD is fabricated by hydrogen-resist lithography…
Non-local polarization feedback in a fractional quantum Hall ferromagnet
Szymon Hennel, Beat A. Braem, Stephan Baer +11
In a quantum Hall ferromagnet, the spin polarization of the two-dimensional electron system can be dynamically transferred to nuclear spins in its vicinity through the hyperfine in…