title: Quasiparticle states at a d-wave vortex core in high- T(c) superconductors: induction of local spin density wave order.
abstract: The local density of states (LDOS) at the vortex lattice cores in a high- T(c) superconductor is studied by using a self-consistent mean-field theory including interactions for both antiferromagnetism (AF) and d-wave superconductivity (DSC). In a zero-field optimally doped sample the AF order is completely suppressed while DSC prevails. In the mixed state, we show that the local AF-like spin density wave order appears near the vortex core and acts as an effective local magnetic field on electrons via Zeeman coupling. As a result, the LDOS at the core exhibits a double-peak structure near the Fermi level that is in good agreement with recent scanning tunneling microscopy observations.
authors.affiliation: Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, USA.
authors.forename: J X
authors.initials: JX
authors.lastname: Zhu
authors.forename: C S
authors.initials: CS
authors.lastname: Ting