Published January 1, 1993
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Journal Article
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Spin and charge dynamics in a one-dimensional two-band Hubbard model
- Creators
- Ding, H.-Q.
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Goddard, W. A., III
Chicago
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Abstract
A CuO chain with one or two holes doped is studied via the two-band Hubbard model in the large-U limit on a finite cluster. The quasiparticle band is E(k) is similar to 0.87J cos(2ka) with the bottom at 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 t-J model. Spin-charge separation also occurs.
Additional Information
©1993 The American Physical Society. Received 20 August 1992. This research was supported by the NSF-DMR-MRG and NSF-CHE. The facilities of the MSC are also supported by grants from DOE-AICD, BP America, Allied-Signal, Asahi Chemical, Asahi Glass, Zerox, and Chevron.Files
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