Hole density dependence of the critical temperature and coupling constant in the cuprate superconductors

Journal Article · Fri Sep 07 04:00:00 EDT 1990 · Science (Washington, D.C.); (USA)

DOI:https://doi.org/10.1126/science.249.4973.1143· OSTI ID:6362207

Whangbo, M ^[1]; Torardi, C C ^[2]

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1. North Carolina State Univ., Raleigh (USA)
2. E.I. du Pont de Nemours and Co., Wilmington, DE (USA)

A bond valence sum (BVS) analysis was performed for the -type cuprate superconductors. The superconducting critical temperature {Tc} versus in-plane Cu-O BVS correlation for copper is grouped into classes and subclasses. Only within a class of subclass for which the nonelectronic effect is constant does the variation of the in-plane Cu-O BVS reflect the corresponding change in the hole density n{sub H} of the CuO{sub 2} layers. This study strongly suggests that the {Tc} for every class or subclass of the superconductors is an inverted parabolic function of n{sub H}, and so is the coupling constant {lambda} for Cooper pair formation. 43 refs., 4 figs., 2 tabs.

• DOE Contract Number: FG05-86ER45259
• OSTI ID: 6362207
• Journal Information: Science (Washington, D.C.); (USA), Journal Name: Science (Washington, D.C.); (USA) Vol. 249:4973; ISSN SCIEA; ISSN 0036-8075
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL TEMPERATURE
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
EXPERIMENTAL DATA
INFORMATION
MOLECULAR STRUCTURE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE