2.5k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- ETH ZurichCH630 papers
- Paul Scherrer InstituteCH136 papers
- École Polytechnique Fédérale de LausanneCH61 papers
- University of ZurichCH45 papers
- University of RegensburgDE44 papers
- Institute of PhysicsPL39 papers
- Centre National de la Recherche ScientifiqueFR37 papers
- Swiss Light Source37 papers
- Polish Academy of SciencesPL36 papers
- P.L. Kapitza Institute for Physical ProblemsRU26 papers
- National Institute for Materials ScienceJP25 papers
- University of GenevaCH23 papers
20 papers · 2 filters
Dynamics of a localized spin excitation close to the spin-helix regime
G. Salis, M. P. Walser, P. Altmann +2
The time evolution of a local spin excitation in a (001)-confined two-dimensional electron gas subjected to Rashba and Dresselhaus spin-orbit interactions of similar strength is in…
Acoustoelectric effects in very high-mobility -SiGe/Ge/SiGe heterostructure at low temperatures in high magnetic fields
I. L. Drichko, V. A. Malysh, I. Yu. Smirnov +4
The contactless Surface Acoustic Wave (SAW) technique was implemented to probe the high-frequency (ac) conductivity in a high-mobility -SiGe/Ge/SiGe structure in the integer qua…
Remote sensor response study in the regime of the microwave radiation-induced magnetoresistance oscillations
Tianyu Ye, Ramesh Mani, Werner Wegscheider
A concurrent remote sensing and magneto-transport study of the microwave excited two dimensional electron system (2DES) at liquid Helium temperatures has been carried out using a c…
Remotely sensed transport in microwave photoexcited GaAs/AlGaAs two-dimensional electron system
Tianyu Ye, Ramesh Mani, Werner Wegscheider
We demonstrate a strong correlation between the magnetoresistive and the concurrent microwave reflection from the microwave photo-excited GaAs/AlGaAs two-dimensional electron syste…
Scanning Gate Imaging of quantum point contacts and the origin of the 0.7 Anomaly
Andrea Iagallo, Nicola Paradiso, Stefano Roddaro +6
The origin of the anomalous transport feature appearing at conductance G \approx 0.7 x (2e2/h) in quasi-1D ballistic devices - the so-called 0.7 anomaly - represents a long standin…
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…
Spin polarization, dephasing and photoinduced spin diffusion in (110)-grown two-dimensional electron systems
R. Voelkl, M. Schwemmer, M. Griesbeck +5
We study the optically induced spin polarization, spin dephasing and diffusion in several high-mobility two-dimensional electron systems, which are embedded in GaAs quantum wells g…
Spin-orbit splitting and effective masses in p-type GaAs two-dimensional hole gases
Fabrizio Nichele, Atindra Nath Pal, Roland Winkler +4
We present magnetotransport measurements performed on two-dimensional hole gases embedded in carbon doped p-type GaAs/AlGaAs heterostructures grown on [001] oriented substrates. A…
Characterization of Qubit Dephasing by Landau-Zener Interferometry
F. Forster, G. Petersen, S. Manus +5
Controlling coherent interaction at avoided crossings is at the heart of quantum information processing. The regime between sudden switches and adiabatic transitions is characteriz…
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…
Insulating state and giant non-local response in an InAs/GaSb quantum well in the quantum Hall regime
Fabrizio Nichele, Atindra Nath Pal, Patrick Pietsch +4
We present transport measurements performed in InAs/GaSb double quantum wells. At the electron-hole crossover tuned by a gate voltage, a strong increase in the longitudinal resisti…
Spin dynamics in p-doped semiconductor nanostructures subject to a magnetic field tilted from the Voigt geometry
K. Korzekwa, C. Gradl, M. Kugler +9
We develop a theoretical description of the spin dynamics of resident holes in a p-doped semiconductor quantum well (QW) subject to a magnetic field tilted from the Voigt geometry.…
Aharonov-Bohm rings with strong spin-orbit interaction: the role of sample-specific properties
Fabrizio Nichele, Yashar Komijani, Szymon Hennel +6
We present low-temperature transport experiments on Aharonov-Bohm (AB) rings fabricated from two-dimensional hole gases in p-type GaAs/AlGaAs heterostructures. Highly visible h/e (…
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…
Photon- and phonon-assisted tunneling in the three-dimensional charge stability diagram of a triple quantum dot array
Floris R. Braakman, Pierre Barthelemy, Christian Reichl +2
We report both photon- and phonon-assisted tunneling transitions in a linear array of three quantum dots, which can only be understood by considering the full three-dimensionality…
Long-range coherent coupling in a quantum dot array
Floris R. Braakman, Pierre Barthelemy, Christian Reichl +2
Controlling long-range quantum correlations is central to quantum computation and simulation. In quantum dot arrays, experiments so far rely on nearest-neighbour couplings only, an…
A circuit analysis of an in situ tunable radio-frequency quantum point contact
Thomas Müller, Theodore Choi, Sarah Hellmüller +3
A detailed analysis of the tunability of a radio-frequency quantum point contact setup using a C-LCR circuit is presented. We calculate how the series capacitance influences resona…
Counting statistics of hole transfer in a p-type GaAs quantum dot with dense excitation spectrum
Y. Komijani, T. Choi, F. Nichele +4
Low-temperature transport experiments on a p-type GaAs quantum dot capacitively coupled to a quantum point contact are presented. The time-averaged as well as time-resolved detecti…
Anisotropic Zeeman splitting in p-type GaAs quantum point contacts
Y. Komijani, M. Csontos, I. Shorubalko +5
Low-temperature electrical conductance spectroscopy measurements of quantum point contacts implemented in p-type GaAs/AlGaAs heterostructures are used to study the Zeeman splitting…
Origins of conductance anomalies in a p-type GaAs quantum point contact
Y. Komijani, M. Csontos, T. Ihn +4
Low temperature transport measurements on a p-GaAs quantum point contact are presented which reveal the presence of a conductance anomaly that is markedly different from the conven…