Intermediate coupling model of cuprates: Adding fluctuations to a weak coupling model of pseudogap and superconductivity competition

We demonstrate that many features ascribed to strong correlation effects in various spectroscopies of the cuprates are captured by a calculation of the self-energy incorporating effects of spin and charge fluctuations. The self-energy is calculated over the full doping range from half-filling to the...

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Veröffentlicht in:Journal of electron spectroscopy and related phenomena 2010-07, Vol.181 (1), p.23-27
Hauptverfasser: Markiewicz, R.S., Das, Tanmoy, Basak, Susmita, Bansil, A.
Format: Artikel
Sprache:eng ; fre ; ger
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Zusammenfassung:We demonstrate that many features ascribed to strong correlation effects in various spectroscopies of the cuprates are captured by a calculation of the self-energy incorporating effects of spin and charge fluctuations. The self-energy is calculated over the full doping range from half-filling to the overdoped system. In the normal state, the spectral function reveals four subbands: two widely split incoherent bands representing the remnant of the two Hubbard bands, and two additional coherent, spin- and charge-dressed in-gap bands split by a spin-density wave, which collapses in the overdoped regime. The resulting coherent subbands closely resemble our earlier mean-field results. Here we present an overview of the combined results of our mean-field calculations and the newer extensions into the intermediate coupling regime.
ISSN:0368-2048
1873-2526
DOI:10.1016/j.elspec.2010.05.020