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

Ding, H.-Q. and Goddard, W. A., III (1993) Spin and charge dynamics in a one-dimensional two-band Hubbard model. Physical Review B, 47 (2). pp. 1149-1152. ISSN 0163-1829. http://resolver.caltech.edu/CaltechAUTHORS:DINprb93

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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.


Item Type:Article
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.
Subject Keywords:HIGH-TC SUPERCONDUCTORS; FERMI-LIQUID DESCRIPTION; CUPRATE SUPERCONDUCTORS; FLUCTUATIONS; EXCITATIONS; CUO2; ANTIFERROMAGNET; LA2-XSRXCUO4; MECHANISM; OXIDES
Record Number:CaltechAUTHORS:DINprb93
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:DINprb93
Alternative URL:http://dx.doi.org/10.1103/PhysRevB.47.1149
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2272
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:21 Mar 2006
Last Modified:26 Dec 2012 08:48

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