Binding of holes to magnetic impurities in a strongly correlated system

Journal Article · Tue Nov 01 00:00:00 EST 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.13020· OSTI ID:6836519

Poilblanc, D; Scalapino, D J; Hanke, W ^[1]

---

1. Laboratoire de Physique Quantique, Universite Paul Sabatier, 31062 Toulouse (France)

The effect of a magnetic ([ital S]=1/2) impurity coupled to a two-dimensional system of correlated electrons (described by the [ital t]-[ital J] model) is studied by exact diagonalizations. It is found that, if the exchange coupling of the impurity with the neighboring spins is ferromagnetic or weakly antiferromagnetic, an extra hole can form bound states of different spatial symmetries with the impurity extending to a few lattice spacings. The binding energy is maximum when the impurity is completely decoupled (vacancy) and vanishes for an antiferromagnetic coupling exceeding [similar to]0.3[ital J]. Several peaks appear in the single-hole spectral function below the lower edge of the quasiparticle band as signatures of the [ital d]-, [ital s]-, and [ital p]-wave bound states.

• OSTI ID: 6836519
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 50:17; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTAL MODELS
IMPURITIES
HIGH-TC SUPERCONDUCTORS
BOUND STATE
ELECTRON CORRELATION
EXCHANGE INTERACTIONS
HOLES
MAGNETIC PROPERTIES
CORRELATIONS
INTERACTIONS
MATHEMATICAL MODELS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
665400* - Quantum Physics Aspects of Condensed Matter- (1992-)