113 citations · 571 across the 27 of their papers we have counts for
24 papers · 1 filter
Cavity-mediated coherent coupling between distant quantum dots
Giorgio Nicolí, Michael Sven Ferguson, Clemens Rössler +7
Scalable architectures for quantum information technologies require to selectively couple long-distance qubits while suppressing environmental noise and cross-talk. In semiconducto…
Electron backscattering in a cavity: ballistic and coherent effects
A. A. Kozikov, D. Weinmann, C. Rossler +4
Numerous experimental and theoretical studies have focused on low-dimensional systems locally perturbed by the biased tip of a scanning force microscope. In all cases either open o…
Mode specific backscattering in a quantum point contact
A. A. Kozikov, R. Steinacher, C. Rössler +4
We demonstrate a scanning gate grid measurement technique consisting in measuring the conductance of a quantum point contact (QPC) as a function of gate voltage at each tip positio…
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…
Capacitive coupling in hybrid Graphene-GaAs nanostructures
Pauline Simonet, Clemens Rössler, Tobias Krähenmann +5
Coupled hybrid nanostructures are demonstrated using the combination of lithographically patterned graphene on top of a two-dimensional electron gas (2DEG) buried in a GaAs/AlGaAs…
Wave Physics of the Graphene Lattice Emulated in a Ripple Tank
J. Rössler, C. Rössler, P. Märki +2
Using the example of graphene, we have extended the classic ripple tank experiment to illustrate the behavior of waves in periodic lattices. A loudspeaker driving air through a per…
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…
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…
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…
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…
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…
Imaging the Conductance of Integer and Fractional Quantum Hall Edge States
Nikola Pascher, Clemens Rössler, Thomas Ihn +3
We measure the conductance of a quantum point contact (QPC) while the biased tip of a scanning probe microscope induces a depleted region in the electron gas underneath. At finite…
Imaging magnetoelectric subbands in ballistic constrictions
A. A. Kozikov, D. Weinmann, C. Roessler +4
We perform scanning gate experiments on ballistic constrictions in the presence of small perpendicular magnetic fields. The constrictions form the entrance and exit of a circular g…
Tunable Charge Detectors for Semiconductor Quantum Circuits
Clemens Rössler, Tobias Krähenmann, Stephan Baer +4
Nanostructures defined in high-mobility two-dimensional electron systems offer a unique way of controlling the microscopic details of the investigated device. Quantum point contact…
Interference of electrons in backscattering through a quantum point contact
A. A. Kozikov, C. Rössler, T. Ihn +3
Scanning gate microscopy is used to locally investigate electron transport in a high-mobility two-dimensional electron gas formed in a GaAs/AlGaAs heterostructure. Using quantum po…
Quantum dot occupation and electron dwell time in the cotunneling regime
B. Küng, C. Rössler, M. Beck +3
We present comparative measurements of the charge occupation and conductance of a GaAs/AlGaAs quantum dot. The dot charge is measured with a capacitively coupled quantum point cont…
Irreversibility on the Level of Single-Electron Tunneling
B. Küng, C. Rössler, M. Beck +5
We present a low-temperature experimental test of the fluctuation theorem for electron transport through a double quantum dot. The rare entropy-consuming system trajectories are de…
Transport Properties of Clean Quantum Point Contacts
C. Rössler, S. Baer, E. de Wiljes +5
Quantum point contacts are fundamental building blocks for mesoscopic transport experiments and play an important role in recent interference- and fractional quantum Hall experimen…
Highly Tunable Hybrid Quantum Dots with Charge Detection
C. Rössler, B. Küng, S. Dröscher +4
In order to employ solid state quantum dots as qubits, both a high degree of control over the confinement potential as well as sensitive charge detection are essential. We demonstr…
Gating of high-mobility two-dimensional electron gases in GaAs/AlGaAs heterostructures
C. Rossler, T. Feil, P. Mensch +4
We investigate high-mobility two-dimensional electron gases in AlGaAs heterostructures by employing Schottky-gate-dependent measurements of the samples' electron density and mobili…
Magneto-electrical subbands of freely suspended quantum point contacts
C. Rossler, M. Herz, M. Bichler +1
We present a versatile design of freely suspended quantum point contacts with particular large one-dimensional subband quantization energies of up to 10meV. The nanoscale bridges e…
Optically induced transport properties of freely suspended semiconductor submicron channels
C. Rossler, K. -D. Hof, S. Manus +6
We report on optically induced transport phenomena in freely suspended channels containing a two-dimensional electron gas (2DEG). The submicron devices are fabricated in AlGaAs/GaA…
Laterally defined freely suspended quantum dots in GaAs/AlGaAs heterostructures
C Rossler, M Bichler, D Schuh +2
Free standing beams containing a two-dimensional electron system are shaped from a GaAs/AlGaAs heterostructure. Quantum point contacts and (double) quantum dots are laterally defin…