Nature of the pseudogap in the optical conductivity of oxygen-deficient YBa{sub 2}Cu{sub 3}O{sub {ital x}}

Journal Article · Fri Nov 01 00:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.12003· OSTI ID:388323

Abrikosov, A A ^[1]

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1. Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (United States)

The pseudogap in the {ital c}-axis optical conductivity of oxygen-deficient YBa{sub 2}Cu{sub 3}O{sub {ital x}} is explained on the basis of the resonant tunneling through the barrier between the CuO{sub 2} planes with the use of localized centers formed on place of the CuO chains. The conductivity as a function of frequency has a maximum, and its location and magnitude depend only on the spectrum of resonant levels, and hence do not depend on temperature. In the case of a fully oxygenated substance the chains are complete, and no resonance centers are formed. These features were observed in experiment. Comparison is done with existing data. Other possible mechanisms of the pseudogap formation are briefly discussed. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 388323
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 17 Vol. 54; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARIUM OXIDES
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ENERGY GAP
FREQUENCY DEPENDENCE
HIGH-TC SUPERCONDUCTORS
LOCALIZED STATES
OPTICAL PROPERTIES
TEMPERATURE DEPENDENCE
TUNNEL EFFECT
YTTRIUM OXIDES