244 citations · 3.6k across the 109 of their papers we have counts for
6 papers · 2 filters
Coulomb Drag as a Probe of the Nature of Compressible States in a Magnetic Field
K. Muraki, J. G. S. Lok, S. Kraus +5
Magneto-drag reveals the nature of compressible states and the underlying interplay of disorder and interactions. At ν=3/2 a clear T^{4/3} dependence is observed, which signifies t…
Magnetic field dependent transmission phase of a double dot system in a quantum ring
M. Sigrist, A. Fuhrer, T. Ihn +4
The Aharonov-Bohm effect is measured in a four-terminal open ring geometry based on a Ga[Al]As heterostructure. Two quantum dots are embedded in the structure, one in each of the t…
Kelvin Probe Spectroscopy of a Two-Dimensional Electron Gas Below 300 mK
T. Vancura, S. Kicin, T. Ihn +3
A scanning force microscope with a base temperature below 300 mK is used for measuring the local electron density of a two-dimensional electron gas embedded in an Ga[Al]As heterost…
Combined atomic force microscope and electron-beam lithography used for the fabrication of variable-coupling quantum dots
M. C. Rogge, C. Fuehner, U. F. Keyser +4
We have combined direct nanofabrication by local anodic oxidation with conventional electron-beam lithography to produce a parallel double quantum dot based on a GaAs/AlGaAs hetero…
Metamorphosis of the Quantum Hall Ferromagnet at
Michelle Chen, Woowon Kang, Werner Wegscheider
We report on the dramatic evolution of the quantum Hall ferromagnet in the fractional quantum Hall regime at filling. A large enhancement in the characteristic timescale g…
Singlet-Triplet Transition Tuned by Asymmetric Gate Voltages in a Quantum Ring
A. Fuhrer, T. Ihn, K. Ensslin +2
Wavefunction and interaction effects in the addition spectrum of a Coulomb blockaded many electron quantum ring are investigated as a function of asymmetrically applied gate voltag…