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Dynamics of one hole in the polarized t−J model

✍ Scribed by K. Hallberg; A.G. Rojo; C.A. Balseiro

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
506 KB
Volume
171
Category
Article
ISSN
0921-4526

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✦ Synopsis

We calculate the one-hole spectral function for the polarized t-J model using exact diagonalization for a finite size cluster. A well-defined quasiparticle peak appears at the bottom of the spectrum for intermediate values of J. The momentum of the quasiparticle corresponding to the bottom of the band varies with the magnetization and the strength of the coupling J. We use these results to analyze the one-particle spectra in strong coupling superconductors.

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We present a description of the ground state and low-lying excited states of two holes in the 4 x 4 cluster t-J model in terms of a simple model for the motion of a single bipolaron. The existence of short-range antiferromagnetic correlations has been assumed. According to the suggested scenario, th