27 citations · 104 across the 8 of their papers we have counts for
8 papers · 1 filter
Excess noise in AlGaAs/GaAs based quantum rings
Christian Riha, Sven S. Buchholz, Olivio Chiatti +3
Cross-correlated noise measurements are performed in etched AlGaAs/GaAs based quantum rings in equilibrium at bath temperature of $T_\text{bath}=4.2\tex…
Electrical and terahertz magnetospectroscopy studies of laser-patterned micro- and nanostructures on InAs-based heterostructures
Olivio Chiatti, Sven S. Buchholz, Christian Heyn +4
Nanostructures fabricated from narrow-gap semiconductors with strong spin-orbit interaction (SOI), such as InAs, can be used to filter momentum modes of electrons and offer the pos…
Mode-selected heat flow through a one-dimensional waveguide network
Christian Riha, Philipp Miechowski, Sven S. Buchholz +4
Cross-correlated measurements of thermal noise are performed to determine the electron temperature in nanopatterned channels of a GaAs/AlGaAs heterostructure at 4.2 K. Two-dimensio…
Noise thermometry in narrow 2D electron gas heat baths connected to a quasi-1D interferometer
Sven S. Buchholz, Elmar Sternemann, Olivio Chiatti +3
Thermal voltage noise measurements are performed in order to determine the electron temperature in nanopatterned channels of a GaAs/AlGaAs heterostructure at bath temperatures of 4…
Mode-filtered electron injection into a waveguide interferometer
Sven S. Buchholz, Ulrich Kunze, Saskia F. Fischer +2
Injection of mode-filtered electrons into a phase-sensitive four-terminal waveguide Aharonov-Bohm (AB) ring is studied. An individually tuneable quantum point contact (QPC) in a wa…
Phase shifts and phase -jumps in four-terminal waveguide Aharonov-Bohm interferometers
Christoph Kreisbeck, Tobias Kramer, Sven S. Buchholz +4
Quantum coherent properties of electrons can be studied in Aharonov-Bohm (AB) interferometers. We investigate both experimentally and theoretically the transmission phase evolution…
Control of the transmission phase in an asymmetric four-terminal Aharonov-Bohm interferometer
Sven S. Buchholz, Saskia F. Fischer, Ulrich Kunze +3
Phase sensitivity and thermal dephasing in coherent electron transport in quasi one-dimensional (1D) waveguide rings of an asymmetric four-terminal geometry are studied by magnetot…
Non-local Aharonov-Bohm conductance oscillations in an asymmetric quan-tum ring
S. S. Buchholz, S. F. Fischer, U. Kunze +2
We investigate ballistic transport and quantum interference in a nanoscale quantum wire loop fab-ricated as a GaAs/AlGaAs field-effect heterostructure. Four-terminal measurements o…