Novel mechanism for superconductivity in the resonating-valence-bond ground state

Journal Article · Sat Oct 01 04:00:00 EDT 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.38.7192· OSTI ID:7063158

Sutherland, B

Assuming that the resonating-valence-bond (RVB) ground state is relevant to high-temperature superconductivity as Anderson has proposed, we demonstrate a new mechanism which may lead to pairing between charged vacancies. This mechanism arises as follows: We first embed the RVB model in a more general ''loop gas.'' Then in the loop gas we identify a phase transition. The ''order parameter'' of the loop gas is shown to be like that of a planar rotor, and thus the ordered phase is of the Kosterlitz-Thouless type. Charged vacancies are then shown to have an order-parameter winding number of +- 1, and thus will bind into doubly charged vacancy-vortex pairs.

• Research Organization: Department of Physics, University of Utah, Salt Lake City, Utah 84112
• OSTI ID: 7063158
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:10; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHARGE STATES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
FUNCTIONS
INTERACTIONS
MONTE CARLO METHOD
ORDER PARAMETERS
PAIRING INTERACTIONS
PARTITION FUNCTIONS
POINT DEFECTS
SUPERCONDUCTORS
VACANCIES