Hole pairing within an extended Anderson impurity model applicable to the high-/ital T//sub /ital c// cuprates

Journal Article · Thu Jun 01 00:00:00 EDT 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.12286· OSTI ID:6035645

Sarma, D D; Ramasesha, S; Taraphder, A

We calculate the binding energy of a hole-pair within the extended Anderson Hamiltonian for the high-/ital T//sub /ital c// cuprates including a Cu impurity and an oxygen-derived band. The results indicate that stable hole pairs can be formed for intra-atomic and interatomic Coulomb repulsion strengths larger than 6 and 3.5 eV, respectively. It is also shown that the total hybridization strength between the Cu 3/ital d/ and oxygen /ital p/-bands should be less than 2.5 eV. The hole pairing takes place primarily within the oxygen-derived /ital p/ band. The range of parameter values for which hole pairing occurs is also consistent with the earlier photoemission results from these cuprates.

• Research Organization: Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore-560012, India(IN); Department of Physics, Indian Institute of Science, Bangalore-560012, India
• OSTI ID: 6035645
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 39:16
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
SUPERCONDUCTORS
HOLES
BINDING ENERGY
CUPRATES
HAMILTONIANS
HYBRIDIZATION
PHOTOEMISSION
COPPER COMPOUNDS
EMISSION
ENERGY
MATHEMATICAL OPERATORS
OXYGEN COMPOUNDS
QUANTUM OPERATORS
SECONDARY EMISSION
TRANSITION ELEMENT COMPOUNDS
656100* - Condensed Matter Physics- Superconductivity