[Zurück]

D. Geiger:
"Designing microwave experiments for milikelvin temperatures";
Poster: NGSCES 2012 - The new generation in strongly correlated electron systems conference, Portoroz, Slowenien; 24.06.2012 - 29.06.2012.

Correlation effects of electrons in solids are responsible for many intensively studied
phenomena like superconductivity and quantum criticality. These effects involve low
energy scales and their experimental investigation therefore requires specialized conditions:
on the one hand, the studied materials have to be cooled to low temperatures; on
the other hand, any kind of non-thermal excitation to the system also has to be in a
low-energy range. One very direct way to study the response of the electronic system to
a low-energy excitation is using electromagnetic radiation in the microwave range. Implementing
a microwave experiment into a low-temperature environment is challenging
from a technical point of view since high sensitivity has to be achieved without heating
the sample and the system by the radiation itself or by thermal conduction through the
microwave cables. We present different experimental approaches to measure electronic
NGSCES 2012 32
Cilento B8
properties of metallic samples with microwave radiation down to temperatures in the
mK range.
We gratefully acknowledge financial support from the European Research Council/
ERC Advanced Grant No 227378.