Zobrazeno 1 - 10
of 146
pro vyhledávání: '"Tranitz, H. P."'
Autor:
Taubert, D., Tomaras, C., Schinner, G. J., Tranitz, H. P., Wegscheider, W., Kehrein, S., Ludwig, S.
Publikováno v:
Phys. Rev. B 83, 235404 (2011)
The energy relaxation channels of hot electrons far from thermal equilibrium in a degenerate two-dimensional electron system are investigated in transport experiments in a mesoscopic three-terminal device. We observe a transition from two dimensions
Externí odkaz:
http://arxiv.org/abs/1104.1645
Publikováno v:
Journal of Applied Physics 109, 102412 (2011)
A three-terminal device based on a two-dimensional electron system is investigated in the regime of non-equilibrium transport. Excited electrons scatter with the cold Fermi sea and transfer energy and momentum to other electrons. A geometry analogous
Externí odkaz:
http://arxiv.org/abs/1011.2289
Autor:
Prokudina, M. G., Khrapai, V. S., Ludwig, S., Kotthaus, J. P., Tranitz, H. P., Wegscheider, W.
Publikováno v:
Physical Review B 82, 201310(R) (2010)
We explore the acoustic phonon-based interaction between two neighboring coplanar circuits containing semiconductor quantum point contacts in a perpendicular magnetic field B. In a drag-type experiment, a current flowing in one of the circuits (unbia
Externí odkaz:
http://arxiv.org/abs/1008.0963
Publikováno v:
Phys. Rev. B 82, 195310 (2010)
Time-resolved electron dynamics in coupled quantum dots is directly observed by a pulsed-gate technique. While individual gate voltages are modulated with periodic pulse trains, average charge occupations are measured with a nearby quantum point cont
Externí odkaz:
http://arxiv.org/abs/1006.5554
Autor:
Taubert, D., Schinner, G. J., Tranitz, H. P., Wegscheider, W., Tomaras, C., Kehrein, S., Ludwig, S.
Publikováno v:
Physical Review B 82, 161416(R) (2010)
Scattering of otherwise ballistic electrons far from equilibrium is investigated in a cold two-dimensional electron system. The interaction between excited electrons and the degenerate Fermi liquid induces a positive charge in a nanoscale region whic
Externí odkaz:
http://arxiv.org/abs/1001.5201
We investigate an electronic Mach-Zehnder interferometer with high visibility in the quantum Hall regime. The superposition of the electrostatic potentials from a quantum point contact (QPC) and the residual disorder potential from doping impurities
Externí odkaz:
http://arxiv.org/abs/0912.1230
Publikováno v:
Phys. Rev. Lett. 104, 196801 (2010)
Quantum point contacts (QPCs) are commonly employed to capacitively detect the charge state of coupled quantum dots (QD). An indirect back-action of a biased QPC onto a double QD laterally defined in a GaAs/AlGaAs heterostructure is observed. Energy
Externí odkaz:
http://arxiv.org/abs/0910.4093
Interactions between mesoscopic devices induced by interface acoustic phonons propagating in the plane of a two-dimensional electron system (2DES) are investigated by phonon-spectroscopy. In our experiments ballistic electrons injected from a biased
Externí odkaz:
http://arxiv.org/abs/0901.3520
Publikováno v:
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES Volume: 40 Issue: 5 Pages: 995-998 (2008)
We report on nonequilibrium interaction phenomena between adjacent but electrostatically separated nanostructures in GaAs. A current flowing in one externally biased nanostructure causes an excitation of electrons in a circuit of a second nanostructu
Externí odkaz:
http://arxiv.org/abs/0805.0727
Publikováno v:
J. Phys.: Condens. Matter 20 (2008) 454205
We briefly overview our recent results on nonequilibrium interactions between neighboring electrically isolated nanostructures. One of the nanostructures is represented by an externally biased quantum point contact (drive-QPC), which is used to suppl
Externí odkaz:
http://arxiv.org/abs/0805.0724