d-Wave bipolaronic stripes and two energy scales in cuprates

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dc.creatorAlexandrov, A. S.
dc.date2000-10-04
dc.date2000-10-05
dc.date.accessioned2026-07-07T02:38:55Z
dc.date.available2026-07-07T02:38:55Z
dc.descriptionThere is strong experimental evidence for pairing of polaronic carriers in the normal state, two distinct energy scales, d-wave superconducting order parameter,and charge segregation in the form of stripes in several cuprates.All these remarkable phenomena might be unified in the framework of the bipolaron theory as a result of the formation of mobile bipolarons in the normal state and their Bose-Einstein condensation. Extending the BCS theory towards an intermediate and strong-coupling regime we show that there are two energy scales in this regime, a temperature independent incoherent gap and a temperature dependent coherent gap combining into one temperature dependent global gap. The temperature dependence of the gap and single particle (Giaver) tunnelling spectra in cuprates are quantitatively described. A framework for understanding of two distinct energy scales observed in Giaver tunnelling and Andreev reflection experiments is provided. We suggest that both d-wave superconducting order parameter and striped charge distribution result from the bipolaron (center-of-mass) energy band dispersion rather than from any particular interaction.
dc.description7 pages, 2 figures, Invited paper at the 3rd International Conference 'Stripes and High Tc Superconductivity' (Rome, September 25-30, 2000)
dc.identifierhttps://arxiv.org/abs/cond-mat/0010060
dc.identifierhttp://arxiv.org/abs/cond-mat/0010060
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/16863
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titled-Wave bipolaronic stripes and two energy scales in cuprates
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