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Title: ARPES-parameterized Hubbard approach to d-wave cuprate superconductors

In the last decade, the Angle Resolved Photoemission Spectroscopy (ARPES) has achieved important advances in both energy and angular resolutions, providing a direct measurement of the single-particle dispersion relation and superconducting gap. These dispersion relation data allow a full determination of the self-energy, first and second neighbor parameters in the Hubbard model. This model and its generalizations offer a simple and general way to describe the electronic correlation in solids. In particular, the parameters of correlated hopping interactions, responsible of the d-wave superconductivity in the generalized Hubbard model, are determined from ARPES data and the critical temperature within the mean-field approximation. In this work, we determine the model parameters for Bi{sub 2}Sr{sub 2−x}La{sub x}CuO{sub 6+δ} and study its d-wave superconducting gap as a function of temperature by solving numerically two coupled integral equations. Finally, the calculated electronic specific heat is compared with experimental results.
Authors:
 [1] ; ;  [2]
  1. Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20-364, 01000 D.F. (Mexico)
  2. Instituo de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apartado Postal 70-360, 04510 D.F. (Mexico)
Publication Date:
OSTI Identifier:
22264043
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1574; Journal Issue: 1; Conference: International cryogenic materials conference, Anchorage, AK (United States), 17-21 Jun 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPARATIVE EVALUATIONS; CRITICAL TEMPERATURE; CUPRATES; DISPERSION RELATIONS; ELECTRONIC SPECIFIC HEAT; HUBBARD MODEL; INTEGRAL EQUATIONS; INTERACTIONS; PHOTOEMISSION; SELF-ENERGY; SOLIDS; SPECTROSCOPY; SUPERCONDUCTIVITY; SUPERCONDUCTORS; TEMPERATURE DEPENDENCE