corner
corner
APS » Journals » Phys. Rev. B » Volume 55 » Issue 8
< Previous Article | Next Article >

Phys. Rev. B 55, R4859–R4862 (1997)

Spectral functions of one-dimensional models of correlated electrons

Download: PDF (144 kB) Buy this article Export: BibTeX or EndNote (RIS)

Julien Favand
Laboratoire de Physique Quantique, UniversitéPaul Sabatier, 31062 Toulouse, France

Stephan Haas
Theoretische Physik, ETH-Hönggerberg, 8093 Zürich, Switzerland

Karlo Penc
Max-Planck-Institut für Physik komplexer Systeme, Bayreuther Strasse 40, 01187 Dresden, Germany

Frédéric Mila
Laboratoire de Physique Quantique, UniversitéPaul Sabatier, 31062 Toulouse, France

Elbio Dagotto
Department of Physics and National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306

Received 21 October 1996; published in the issue dated 15 February 1997

Using the Ogata-Shiba wave function, the spectral functions of the one-dimensional infinite-U Hubbard model are calculated for various concentrations. It is shown that the ``shadow-band'' feature due to 2kF fluctuations becomes more intense close to half filling. Comparing these results with exact-diagonalization data obtained on finite clusters for the finite-U Hubbard model and for the t-J model, it is also shown that this feature remains well defined for physically reasonable values of the parameters (U/t≃10, J/t≃0.4). The ``shadow'' structure in the spectral functions should thus be observable in angle-resolved photoemission experiments for a variety of quasi-one-dimensional compounds.

© 1997 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.55.R4859
DOI:
10.1103/PhysRevB.55.R4859
PACS:
79.60.-i, 71.10.Fd, 78.20.Bh
 
< Previous Article | Next Article >