Issue |
Europhys. Lett.
Volume 34, Number 9, June III 1996
|
|
---|---|---|
Page(s) | 711 - 716 | |
Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
DOI | https://doi.org/10.1209/epl/i1996-00519-4 | |
Published online | 01 September 2002 |
Renormalization group analysis of electrons near a van Hove singularity
1
Instituto de Estructura de la Materia,
Consejo Superior de Investigaciones Científicas,
Serrano 123, 28006 Madrid, Spain
2
Instituto de Ciencia de Materiales,
Consejo Superior de Investigaciones Científicas,
Cantoblanco, 28049 Madrid, Spain
3
Departamento de Matemáticas,
Universidad Carlos III,
Butarque 15,
Leganés, 28913 Madrid, Spain
A model of interacting two-dimensional electrons near a van Hove singularity is studied, using renormalization group techniques. The coupling constants show a logarithmic dependence on the high-energy cut-off, unlike in conventional Fermi liquids. The chemical potential tends to be renormalized towards the van Hove energy. Scattering of pairs between the two inequivalent singularities of a square lattice can lead to anisotropic superconductivity.
PACS: 75.10.Jm – Quantized spin models / 75.10.Lp – Band and itinerant models / 75.30.Ds – Spin waves
© EDP Sciences, 1996
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