Open AccessTransation of charged vortex structures in underdoped high-temperature superconductors
Author(s) -
Hongwei Zhao,
Hua Meng,
Lingfeng Zhang,
Guo-Qiao Zha,
Shanshan Zhou
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.4189
Subject(s) - condensed matter physics , vortex , superconductivity , physics , checkerboard , coulomb , scanning tunneling microscope , hamiltonian (control theory) , charge density wave , quantum tunnelling , tourbillon , transition temperature , mean field theory , zero temperature , quantum mechanics , mathematical optimization , geometry , mathematics , thermodynamics , electron
Vortex structures in high-temperature superconductors are studied by solving Bogoliubov-de Gennes equations based on a mean-field t-t′-U-V-Vc model. The results show that transition from checkerboard pattern to stripe structure for spin density wave, charge density wave, and d-wave orderings may occur by enhancing the strength of the on-site repulsion U. When a reasonable long-range Coulomb interaction is introduced into the model Hamiltonian, two-dimensional modulations or the checkerboard patterns may appear for the underdoped samples, which is consistent with the scanning-tunneling-microscopy experiments.