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APS » Journals » Phys. Rev. B » Volume 54 » Issue 6
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Phys. Rev. B 54, R3718–R3721 (1996)

Photoemission spectra in t-J ladders with two legs

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Stephan Haas and Elbio Dagotto
Theoretische Physik, Eidenössiche Technische Hochschule Zürich-Hoenggerberg, CH-8093 Zurich, Switzerland and National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306

Received 15 April 1996; published in the issue dated 1 August 1996

Photoemission spectra for the isotropic two-leg t-J ladder are calculated at various hole-doping levels using exact diagonalization techniques. Low-energy sharp features caused by short-range antiferromagnetic correlations are observed at finite doping levels close to half-filling, above the naive Fermi momentum. These features should be observable in angle-resolved photoemission experiments. In addition, the formation of a d-wave pairing condensate as the ratio J/t is increased leads to dynamically generated spectral weight for momenta close to kF where the dx2-y2 order parameter is large.

© 1996 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.54.R3718
DOI:
10.1103/PhysRevB.54.R3718
PACS:
 
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