Superconductivity in ladders and coupled planes

Journal Article · Sun Mar 01 04:00:00 EST 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.45.5744· OSTI ID:7234186

Dagotto, E; Riera, J; Scalapino, D ^[1]

---

1. Department of Physics, Center for Materials Research and Technology, Florida State University, Tallahassee, Florida 32306 (United States)

We discuss an electronic model consisting of two chains or planes, each described by a {ital t}-{ital J} model, coupled by {ital t}{prime}-{ital J}{prime} interactions between them. For {ital J}{prime}{similar to}{ital J} or larger we show the presence of a spin-gap and hole-pair formation upon doping. The model exhibits superconducting pairing correlations away from half filling. We support our claims by numerical studies of the spin gap, the binding energy of holes, and the pairing correlations on finite clusters. The hole-pairing operator is a spin singlet with one member of the pair in each chain or plane. Our model belongs to the universality class of the {ital U}{lt}0 Hubbard model with {vert bar}{ital U}{vert bar}{much gt}{ital t}. We argue that this model may be physically realized by doping the orthorhombic compound (VO){sub 2}P{sub 2}O{sub 7}.

• OSTI ID: 7234186
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 45:10; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BINDING ENERGY
CHALCOGENIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY
ENERGY GAP
HOLES
IMPURITIES
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
PHOSPHORUS OXIDES
PHYSICAL PROPERTIES
QUANTIZATION
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
VANADIUM OXIDES