74 citations · 222 across the 8 of their papers we have counts for
10 papers
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…
Nonequilibrium transport in density-modulated phases of the second Landau level
S. Baer, C. Rössler, S. Hennel +5
We investigate non-equilibrium transport in the reentrant integer quantum Hall phases of the second Landau level. At high currents, we observe a transition from the reentrant integ…
Experimental probe of topological orders and edge excitations in the second Landau level
Stephan Baer, Clemens Rössler, Thomas Ihn +3
We measure weak quasiparticle tunneling across a constriction in the second Landau level. At = 7/3, 8/3 and 5/2, comparison of temperature and DC bias dependence to weak tunnel…
Increasing the ν = 5 / 2 gap energy: an analysis of MBE growth parameters
Christian Reichl, Jun Chen, Stephan Baer +5
The fractional quantized Hall state (FQHS) at the filling factor ν = 5/2 is of special interest due to its possible application for quantum computing. Here we report on the optimiz…
Interplay of fractional quantum Hall states and localization in quantum point contacts
S. Baer, C. Rössler, E. C. de Wiljes +5
We investigate integer and fractional quantum Hall states in quantum point contacts (QPCs) of different geometries, defined in AlGaAs/GaAs heterostructures employing different dopi…
Cyclic Depopulation of Edge States in a large Quantum Dot
Stephan Baer, Clemens Rössler, Thomas Ihn +3
We investigate magneto-transport through a 1.6 μm wide quantum dot (QD) with adjacent charge detector, for different integer filling factors in the QD and constrictions. When this…