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Título

Superconducting and pseudogap phases from scaling near a Van Hove singularity

AutorGonzález Carmona, José
Fecha de publicación27-feb-2003
EditorAmerican Physical Society
CitaciónPhysical Review B 67: 545101-5451011 (2003)
ResumenWe study the corrections to the Fermi energy induced by the interactions in a two-dimensional electron system, showing that it is attracted towards the Van Hove singularity for a certain range of doping levels. The scaling of the Fermi level allows to cure the infrared singularities left in the BCS channel after renormalization of the leading logarithm near the divergent density of states. A phase of d-wave superconductivity arises beyond the point of optimal doping corresponding to the peak of the superconducting instability. For lower doping levels, the condensation of particle-hole pairs due to the nesting of the saddle-points takes over, leading to the opening of a gap for quasiparticles in the neighborhood of the singular points. ©2003 American Physical Society
Descripción11 págs.; 20 figs. ; PACS number (s): 74.20.Mn, 71.10.Hf
Versión del editorhttps://doi.org/10.1103/PhysRevB.67.054510
URIhttp://hdl.handle.net/10261/140750
DOI10.1103/PhysRevB.67.054510
Identificadoresdoi: 10.1103/PhysRevB.67.054510
issn: 0163-1829
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