Quasiparticles and photoemission spectra in correlated fermion systems

P. Horsch, W. H. Stephan, K. v. Szczepanski, M. Ziegler, W. von der Linden

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We present some selected numerical results for the spectral function of two models currently discussed for HTSC. For the t-J model we find a quasiparticle band with dispersion ϵk→ ≈ J2(cos kx + cos ky)2 well separated from a broad continuum of states (7t). For the Emery model photoemission and inverse photoemission spectra for the insulating (undoped) and for doped cases are discussed. In the doped case new states with strong O-character appear in the charge transfer gap, which appear to be responsible for conductivity in hole-doped HTSC.
Original languageEnglish
Pages (from-to)783-784
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Volume162–164, Part 1
Publication statusPublished - 1 Dec 1989

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