576 citations · 5.2k across the 121 of their papers we have counts for
12 papers · 1 filter
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…
Suppressed decay of a laterally confined persistent spin helix
P. Altmann, M. P. Walser, C. Reichl +2
We experimentally investigate the dynamics of a persistent spin helix in etched GaAs wire structures of 2 to 80 um width. Using magneto-optical Kerr rotation with high spatial reso…
Spin relaxation anisotropy in a GaAs quantum dot
P. Scarlino, E. Kawakami, P. Stano +4
We report that the electron spin relaxation time, T1, in a GaAs quantum dot with a spin-1/2 ground state has a 180 degree periodicity in the orientation of the in-plane magnetic fi…
Ultrastrong Coupling in the Near-field of Complementary Split Ring Resonators
Curdin Maissen, Giacomo Scalari, Federico Valmorra +7
The ultrastrong light-matter interaction regime was investigated in metallic and superconducting complementary split ring resonators coupled to the cyclotron transition of two dime…
Scanning-gate-induced effects and spatial mapping of a cavity
R. Steinacher, A. A. Kozikov, C. Rössler +4
Tailored electrostatic potentials are the foundation of scanning gate microscopy. We present several aspects of the tip-induced potential on the two-dimensional electron gas. First…
Evaluating charge noise acting on semiconductor quantum dots in the circuit quantum electrodynamics architecture
Julien Basset, Anna Stockklauser, David-Dominik Jarausch +6
We evaluate the charge noise acting on a GaAs/GaAlAs based semiconductor double quantum dot dipole-coupled to the voltage oscillations of a superconducting transmission line resona…
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…
Spectroscopy of Equilibrium and Non-Equilibrium Charge Transfer in Semiconductor Quantum Structures
Clemens Rössler, Simon Burkhard, Tobias Krähenmann +7
We investigate equilibrium and non-equilibrium charge-transfer processes by performing high-resolution transport spectroscopy. Using electrostatically defined quantum dots for ener…
Locally induced quantum interference in scanning gate experiments
A. A. Kozikov, R. Steinacher, C. Rössler +4
We present conductance measurements of a ballistic circular stadium influenced by a scanning gate. When the tip depletes the electron gas below, we observe very pronounced and regu…
Resonant electron tunneling in a tip-controlled potential landscape
N. Pascher, F. Timpu, C. Rossler +4
By placing the biased tip of an atomic force microscope at a specific position above a semiconductor surface we can locally shape the potential landscape. Inducing a local repulsiv…
Magnetoresistance Induced by Rare Strong Scatterers in a High Mobility 2DEG
L. Bockhorn, I. V. Gornyi, D. Schuh +3
We observe a strong negative magnetoresistance at non-quantizing magnetic fields in a high-mobility two-dimensional electron gas (2DEG). This strong negative magnetoresistance cons…