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10 papers · 2 filters
High Frequency Conductivity in the Quantum Hall Regime
F. Hohls, U. Zeitler, R. J. Haug
We have measured the complex conductivity of a two-dimensional electron system in the quantum Hall regime up to frequencies of 6 GHz at electron temperatures below 100 mK.…
High frequency conductivity in the quantum Hall effect
F. Hohls, U. Zeitler, R. J. Haug +1
We present high frequency measurements of the diagonal conductivity sigma_xx of a two dimensional electron system in the integer quantum Hall regime. The width of the sigma_xx peak…
Measurement of the energy dependence of phase relaxation by single electron tunneling
P. König, J. Könemann, T. Schmidt +3
Single electron tunneling through a single impurity level is used to probe the fluctuations of the local density of states in the emitter. The energy dependence of quasi-particle r…
Resonant tunneling through zero-dimensional impurity states: Effects of a finite temperature
P. König, U. Zeitler, J. Könemann +2
We have performed temperature dependent tunneling experiments through a single impurity in an asymmetric vertical double barrier tunneling structure. In particular in the charging…
Resonant Tunnelling through InAs Quantum Dots in Tilted Magnetic Fields: Experimental Determination of the g-factor Anisotropy
J. M. Meyer, I. Hapke-Wurst, U. Zeitler +2
We have determined the Landé factor g* in self-organized InAs quantum dots using resonant-tunnelling experiments. With the magnetic field applied parallel to the growth direction z…
Phonon emission and absorption in the fractional quantum Hall effect
F. Schulze-Wischeler, U. Zeitler, M. Monka +3
We investigate the time dependent thermal relaxation of a two-dimensional electron system in the fractional quantum Hall regime where ballistic phonons are used to heat up the syst…