Application of Bogoliubov-de Gennes equations to vortices in Hubbard superconductors. Issue 1753 (16th February 2015)

• Record Type: Journal Article
• Authors: Wang, Chumin; Galván, César G.; Pérez, Luis A.
• Editors: Calderer, C.; Lipton, R.; Margetis, D.; Otto, F.
• Is Part Of: MRS proceedings. Issue 1753:(2015)
• Publication Date: 2015-02-16
• Subjects: superconducting, -- magnetic properties, -- specific heat; Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/opl.2015.158
• Languages: English
• ISSNs: 0272-9172

Abstract

ABSTRACT: In this work, the formation of d -wave superconducting magnetic vortex is studied within the Bogoliubov-de Gennes formalism and the generalized Hubbard model, which leads to 2 N 2 coupled self-consistent equations for a supercell of N × N atoms. These equations determine the spatial variation of the superconducting gap as a function of the electron concentration and electron-electron interactions. The results show that the superconducting states induced by the correlated hopping (Δ t 3 ) are more sensitive to the presence of magnetic field than those induced by attractive nearest-neighbor interaction ( V ). Furthermore, we calculate the electronic specific heat as a function of the temperature for a given applied magnetic field, whose behavior has a qualitative agreement with experimental data.