SPECTRAL PROPERTIES OF THE 2D HOLSTEIN t–J MODEL

نویسندگان

  • H. Fehske
  • G. Wellein
  • B. Bäuml
چکیده

Employing the Lanczos algorithm in combination with a kernel polynomial moment expansion (KPM) and the maximum entropy method (MEM), we show a way of calculating charge and spin excitations in the Holstein t–J model, including the full quantum nature of phonons. To analyze polaron band formation we evaluate the hole spectral function for a wide range of electron–phonon coupling strengths. For the first time, we present results for the optical conductivity of the 2D Holstein t–J model.

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تاریخ انتشار 1996