Y[sub 1[minus]x]Pr[sub x]Ba[sub 2]Cu[sub 3]O[sub 7]. Charge redistribution between planes and chains
- Groningen Univ. (Netherlands) Physical Inst., Moscow (Russian Federation)
A qualitative discussion is given of the electronic structure and properties of the system Y[sub 1[minus]x]Pr[sub x]Ba[sub 2]Cu[sub 3]O[sub 7] in which there is a transition from a high-T[sub c] superconductor to a magnetic insulator. To reconcile the apparently contradicting experimental data, it is suggested that the progressive hole redistribution between CuO[sub 2] planes and chains occurs with increasing x so that for large Pr content all the holes are in chains and none remain in planes. In this picture one can naturally explain the main properties of this system; notably, one gets an insulating state for pure PrBa[sub 2]Cu[sub 3]O[sub 7], the valence of Pr being still Pr[sup 3+]. Many other properties of Y[sub 1[minus]x]Pr[sub x]Ba[sub 2]Cu[sub 3]O[sub 7[minus][delta]] are naturally explained as well, and several predictions are made. 30 refs., 1 fig.
- OSTI ID:
- 5606869
- Journal Information:
- Journal of Superconductivity; (United States), Journal Name: Journal of Superconductivity; (United States) Vol. 6:2; ISSN JOUSEH; ISSN 0896-1107
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
665412 -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
COPPER COMPOUNDS
ELECTRONIC STRUCTURE
HOLES
HYBRIDIZATION
MAGNETIC PROPERTIES
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
RARE EARTH COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VALENCE
YTTRIUM COMPOUNDS