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30 papers · 1 filter
Dephasing by electron-electron interactions in a ballistic Mach-Zehnder interferometer
Clemens Neuenhahn, Florian Marquardt
We consider a ballistic Mach-Zehnder interferometer for electrons propagating chirally in one dimension (such as in an integer Quantum Hall effect edge channel). In such a system,…
Conductance of fully equilibrated quantum wires
J. Rech, T. Micklitz, K. A. Matveev
We study the conductance of a quantum wire in the presence of weak electron-electron scattering. In a sufficiently long wire the scattering leads to full equilibration of the elect…
Density Enhanced Diffusion of Dipolar Excitons within a One-Dimensional Channel
X. P. Vogele, D. Schuh, W. Wegscheider +2
We experimentally investigate the lateral diffusion of dipolar excitons in coupled quantum wells in two (2D) and one (1D) dimensions. In 2D, the exciton expansion obeys non-linear…
A Schottky top-gated two-dimensional electron system in a nuclear spin free Si/SiGe heterostructure
J. Sailer, V. Lang, G. Abstreiter +8
We report on the realization and top-gating of a two-dimensional electron system in a nuclear spin free environment using 28Si and 70Ge source material in molecular beam epitaxy. E…
Defect Induced Photoluminescence from Dark Excitonic States in Individual Single-Walled Carbon Nanotubes
Hayk Harutyunyan, Tobias Gokus, Alexander A. Green +3
We show that new low-energy photoluminescence (PL) bands can be created in semiconducting single-walled carbon nanotubes by intense pulsed excitation. The new bands are attributed…
A quantum criticality perspective on the charging of narrow quantum-dot levels
V. Kashcheyevs, C. Karrasch, T. Hecht +3
Understanding the charging of exceptionally narrow levels in quantum dots in the presence of interactions remains a challenge within mesoscopic physics. We address this fundamental…