5 papers
Wafer-Scale Epitaxial Modulation of Quantum Dot Density
N. Bart, C. Dangel, P. Zajac +21
Precise control of the properties of semiconductor quantum dots (QDs) is vital for creating novel devices for quantum photonics and advanced opto-electronics. Suitable low QD-densi…
Zero-field thermopower of a thin heterostructure membrane with a 2D electron gas
M. Schmidt, G. Schneider, Ch. Heyn +2
We study the low-temperature thermopower of micron sized, free-standing membranes containing a two-dimensional electron system. Suspended membranes of 320 nm thickness including a…
Thermopower of a 2D electron gas in suspended AlGaAs/GaAs heterostructures
M. Schmidt, G. Schneider, Ch. Heyn +2
We present thermopower measurements on a high electron mobility two-dimensional electron gas (2DEG) in a thin suspended membrane.We show that the small dimension of the membrane su…
Thermal Conductance of Ballistic Point Contacts
Thorben Bartsch, Matthias Schmidt, Christian Heyn +1
We study the thermal conductance of ballistic point contacts. These contacts are realized as few nanometer long pillars in so called air-gap heterostructures (AGHs). The pillar len…
Mobility in Graphene Double Gate Field Effect Transistors
M. C. Lemme, T. J. Echtermeyer, M. Baus +5
In this work, double-gated field effect transistors manufactured from monolayer graphene are investigated. Conventional top-down CMOS-compatible processes are applied except for gr…