title: Far-infrared optical conductivity of CeCu2Si2.
abstract: We investigated the optical reflectivity of the heavy-fermion metal CeCu(2)Si(2) in the energy range 3 meV-30 eV for temperatures between 4 and 300 K. The results for the charge dynamics indicate a behavior that is expected for the formation of a coherent heavy quasiparticle state: upon cooling the spectra of the optical conductivity indicate a narrowing of the coherent response. Below temperatures of 30 K a considerable suppression of conductivity evolves below a peak structure at 13 meV. We assign this gap-like feature to strong electron correlations due to the 4f-conduction electron hybridization.
authors: Max Planck Institute for Chemical Physics of Solids, Dresden, Germany. Sichelschmidt@cpfs.mpg.de
authors: J
authors: J
authors: Sichelschmidt
authors: A
authors: A
authors: Herzog
authors: H S
authors: HS
authors: Jeevan
authors: C
authors: C
authors: Geibel
authors: F
authors: F
authors: Steglich
authors: T
authors: T
authors: Iizuka
authors: S
authors: S
authors: Kimura
mesh_terms: D002586:Cesium / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D055620:Optical Phenomena; D012825:Silicon / Q000737:chemistry*; D013055:Spectrophotometry, Infrared
chemical_list: D002586:Cesium; D003300:Copper; D012825:Silicon