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Universal oscillations in counting statistics
It is shown that the oscillations of the cumulants in fact constitute a universal phenomenon, appearing as functions of almost any parameter, including time in the transient regime, and the theory provides a unified interpretation of previous theoretical studies of high-ordercumulants as well as new experimental data.
Edge-state transport and its experimental consequences in high magnetic fields
Many magnetotransport experiments in two-dimensional electron systems have been explained in recent years within the so-called edge-state model. Starting from a historical context, the model is
Spin noise spectroscopy in GaAs.
The electron-spin relaxation time and the electron Landé g factor in -doped GaAs at low temperatures is measured and good agreement of the measured noise spectrum with a theory based on Poisson distribution probability is found.
Noise enhancement due to quantum coherence in coupled quantum dots.
It is demonstrated that this novel mechanism for super-Poissonian charge transfer is very sensitive to decoherence caused by electron-phonon scattering as inferred from the measured temperature dependence.
Fabrication of a single-electron transistor by current-controlled local oxidation of a two-dimensional electron system
The surface layers of a GaAs/AlGaAs heterostructure are locally oxidized using an atomic force microscope. The local anodic oxidation depletes the underlying two-dimensional electron gas leading to
Two-path transport measurements on a triple quantum dot
As an advanced quantum system, a three terminal triple quantum dot with one lead attached to each dot allows us to simultaneously measure a transport along two different paths. Quadruple points with
Magnetoresistance induced by rare strong scatterers in a high-mobility two-dimensional electron gas
We observe a strong negative magnetoresistance at non-quantizing magnetic fields in a high-mobility two-dimensional electron gas (2DEG). This strong negative magnetoresistance consists of a narrow
Graphene-like metal–organic frameworks: morphology control, optimization of thin film electrical conductivity and fast sensing applications
The metal–organic framework Cu-2,3,6,7,10,11-hexahydroxytriphenylene (Cu3hhtp2-MOF), a copper-based graphene-like framework, is one of the few MOFs featuring inherent electrical conductivity. Here,
Hopping conductivity in the quantum Hall effect: revival of universal scaling.
Using variable-range hopping theory, the results show for all samples a power-law behavior xi equivalent to /deltanu/(-gamma) in agreement with the theoretically proposed universal exponent gamma = 2.35.
Measurement of finite-frequency current statistics in a single-electron transistor
It is demonstrated that the electrical fluctuations in a single-Electron transistor can be accurately measured on all relevant frequencies using a nearby quantum point contact for on-chip real-time detection of the current pulses in the single-electron device.