Charge dynamics of Ce-based compounds: Connection between the mixed valent and Kondo-insulator states

Journal Article · Thu Feb 01 04:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.53.R2948· OSTI ID:278754

Bucher, B ^[1]; Schlesinger, Z ^[2]; Mandrus, D; Fisk, Z; Sarrao, J ^[3]; DiTusa, J F; Oglesby, C; Aeppli, G; Bucher, E ^[4]

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1. Laboratorium fuer Festkoerperphysik, Eidgenoessische Technische Hochschule Zuerich, 8093 Zuerich (Switzerland)
2. IBM, Thomas J. Watson Research Center, Yorktown Heights, New York 10958 (United States)
3. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
4. AT&T Bell Laboratories, Murray Hill, New Jersey 07974 (United States)

The reflectivities of the mixed-valent compounds CeSn{sub 3} and CePd{sub 3} have been measured to obtain the optical conductivity as a function of temperature. Both compounds show a renormalization of the low-energy Drude conductivity at low temperatures. In addition, for the low-carrier-density compound CePd{sub 3}, but not for high-carrier-density CeSn{sub 3}, substantial spectral weight lost from the conductivity below 1000 cm{sup {minus}1} reappears in the frequency range 2000{endash}10000 cm{sup {minus}1}, indicating that CePd{sub 3} can be considered a lightly doped Kondo insulator. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 278754
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 6 Vol. 53; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BINARY ALLOY SYSTEMS
CARRIER DENSITY
CERIUM ALLOYS
ELECTRONIC STRUCTURE
KONDO EFFECT
MIXED-VALENCE COMPOUNDS
OPTICAL PROPERTIES
PALLADIUM ALLOYS
REFLECTIVITY
SPECTRAL DENSITY
TEMPERATURE DEPENDENCE
TIN ALLOYS