Spin and charge dynamics in a one-dimensional two-band Hubbard model

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.47.1149· OSTI ID:6898016

Ding, H; Goddard, III, W A ^[1]

---

1. Materials Simulation Center, Beckman Institute, California Institute of Technology, Pasadena, California 91125 (United States)

A CuO chain with one or two holes doped is studied via the two-band Hubbard model in the large-[ital U] limit on a finite cluster. The quasiparticle band is [ital E][sub [ital k]][similar to]0.87[ital J] cos(2[ital ka]) with the bottom at [ital ka]=[pi]/2. The quasiparticles are kinks which have the character of three-spin polarons. The copper spin excitations are incommensurate spin waves. The two doped holes repel each other very slightly, in contrast to the slight attraction in the [ital t]-[ital J] model. Spin-charge separation also occurs.

• OSTI ID: 6898016
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:2; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHALCOGENIDES
CHARGE STATES
COPPER COMPOUNDS
COPPER OXIDES
ONE-DIMENSIONAL CALCULATIONS
OXIDES
OXYGEN COMPOUNDS
QUASI PARTICLES
SPIN WAVES
TRANSITION ELEMENT COMPOUNDS