6533b82dfe1ef96bd1291fee
RESEARCH PRODUCT
Fabry-Perot resonances in birefringent YAlO_3 analyzed at terahertz frequencies
Marc SchefflerJulia P. OstertagMartin DresselMartin Jourdansubject
Range (particle radiation)Materials scienceCondensed matter physicsInfraredPhysics::OpticsStrongly correlated materialCharge carrierFermionThin filmAnisotropyOptical conductivityAtomic and Molecular Physics and Opticsdescription
The optical conductivity of heavy fermions can reveal fundamental properties of the charge carrier dynamics in these strongly correlated electron systems. Here we extend the conventional techniques of infrared optics on heavy fermions by measuring the transmission and phase shift of THz radiation that passes through a thin film of UNi2Al3, a material with hexagonal crystal structure. We deduce the optical conductivity in a previously not accessible frequency range, and furthermore we resolve the anisotropy of the optical response (parallel and perpendicular to the hexagonal planes). At frequencies around 7cm^-1, we find a strongly temperature-dependent and anisotropic optical conductivity that - surprisingly - roughly follows the dc behavior.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-11-21 | Optics Letters |