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TT: Tiefe Temperaturen

TT 15: Korrelierte Elektronensysteme Theorie I

TT 15.2: Vortrag

Dienstag, 27. März 2001, 16:00–16:15, H

Stripes in doped Antiferromagnets: Single Particle Spectral Weight. — •Marc Zacher, Robert Eder, Enrico Arrigoni, and Werner Hanke — Institut für Theoretische Physik - Universität Würzburg

Recent photoemission (ARPES) (1) experiments on cuprate superconductors provide important guidelines for a theory of electronic excitations in the stripe phase. Using a cluster perturbation theory, where short-distance effects are accounted for by exact cluster diagonalization and long-distance effects by perturbation (in the hopping), we calculate the single-particle Green’s function for a striped t-J model. The data obtained quantitatively reproduce salient (ARPES-) features and may serve to rule out No-dqbond-centeredNo-dq in favor of No-dqsite-centeredNo-dq stripes (2).
(1) X.J. Zhou et al., Science 286, 268 (1999).
(2) M.G. Zacher, R. Eder, E. Arrigoni, W. Hanke, Phys. Rev. Lett. 85, 2585 (2000).