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Charge and Spin Dynamics of the Hubbard ChainsWe calculate the local correlation functions of charge and spin for the one-chain and two-chain Hubbard model using density matrix renormalization group method and the recursion technique. Keeping only finite number of states we get good accuracy for the low energy excitations. We study the charge and spin gaps, bandwidths and weights of the spectra for various values of the on-site Coulomb interaction U and the electron filling. In the low energy part, the local correlation functions are different for the charge and spin. The bandwidths are proportional to t for the charge and J for the spin respectively.
Document ID
20010002834
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Park, Youngho
(Academia Sinica, Nankang Taipei, Taiwan, Province of China)
Liang, Shoudan
(NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
August 20, 2013
Publication Date
January 1, 1999
Publication Information
Publication: Physica C
Publisher: Elsevier Science B.V.
Volume: 328
ISSN: 0921-4534
Subject Category
Atomic And Molecular Physics
Funding Number(s)
CONTRACT_GRANT: N00014-92-J-1340
CONTRACT_GRANT: N00014-95-I-0398
CONTRACT_GRANT: NSF DMR-94-03201
Distribution Limits
Public
Copyright
Other

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