Hybridization gap-open in CeIn3

• Published in: Infrared physics & technology 2008-05, Vol.51 (5), p.488-490
• Main Authors: Lee, C.I., Lee, K.E., Song, Y.Y., Im, H.J., Kimura, S., Kwon, Y.S.
• Format: Article
• Language: English
• Subjects: CeIn3; Communication, education, history, and philosophy; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Electron states; Electronic conduction in metals and alloys; Electronic transport in condensed matter; Exact sciences and technology; Hybridization gap; Optical conductivity; Phase transitions and critical phenomena; Physics; Physics literature and publications; Scattering mechanisms and kondo effect; Solid surfaces and solid-solid interfaces; Strongly correlated systems; heavy fermions; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)
• ISSN: 1350-4495; 1879-0275
• DOI: 10.1016/j.infrared.2007.12.021

Reflectivity spectra of CeIn3 are measured at 7, 30, 50, 100, 150, 200 and 300K in wild energy regions from 6meV to 30eV. Optical conductivity spectra are obtained from a Kramers–Kronig’ relation. A hump in the optical conductivity σ1 is observed at about 500cm−1 below 100K, resulting from strong hybridization between conduction electrons and Ce 4f electronic states. The low frequency plasmon indicating the existence of heavy particles is also observed below coherence temperature T∗∼100K.