6533b81ffe1ef96bd1277156
RESEARCH PRODUCT
Frequency-dependent conductivity of UPd2Al3 films
A. A. MukhinA. SeegerFranz MayrAlois LoidlMartin DresselH. AdrianBoris GorshunovPeter LunkenheimerA. V. ProninMichael HuthMartin Jourdansubject
PhysicsCondensed matter physicsPhase (waves)DielectricConductivityCondensed Matter PhysicsDrude modelElectronic Optical and Magnetic MaterialsAmplitudeScattering rateddc:530Radio frequencyElectrical and Electronic EngineeringPseudogapdescription
The transmission of UPd2Al3 films was studied (4 K < T < 300 K) in the frequency range from 4 to 32 cm−1 by using a coherent source interferometer which allows for measuring both, amplitude and phase. In addition we report on radio frequency and optical measurements. Below 20 K the conductivity and dielectric constant show strong deviations from the behavior of a normal metal which cannot simply be explained by a single renormalized Drude model with an enhanced mass and reduced scattering rate. Instead, we find evidence for the opening of a pseudogap with a gap energy of 6 cm−1 and an extremely narrow ω = 0 mode which is responsible for the large DC conductivity.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-01-01 |