2001/08/31 by Jun-ichiro Kishine, Jun‐ichiro Kishine, Patrick A. Lee +1 · 3 citations
Engineering · Physics and Astronomy · #Magnetic confinement fusion research #Physics of Superconductivity and Magnetism #Superconducting Materials and Applications #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.65.064526
27 pages, 14 figures in GIF format, typo corrected
arxiv created 2001/09/03 · openalex publication_date 2002/01/23 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Based on the SU(2) lattice-gauge-theory formulation of the t\ensuremath-J model, we discuss a possible signature of the unit-cell doubling associated with the staggered-flux (SF) state in the lightly doped spin liquid. Although the SF state appears only dynamically in a uniform d-wave superconducting state, a topological defect [SU(2) vortex] freezes the SF state inside the vortex core. Consequently, the unit-cell doubling shows up in the hopping (\ensuremathχij) and pairing (\ensuremathΔij) order parameters of physical electrons. We find that whereas the center in the vortex core is a SF state, as one moves away from the core center, a correlated staggered modulation of \ensuremathχij and \ensuremathΔij becomes predominant. We predict that over the region outside the core and inside the internal gauge-field-penetration depth around a vortex center, the local density of states exhibits a staggered peak-dip (SPD) structure inside the V-shaped profile when measured on the bonds. The SPD structure has its direct origin in the unit-cell doubling associated with the SF core and the robust topological texture, which has little to do with the symmetry of the d-wave order parameter. Therefore the structure may survive the tunneling-matrix-element effects and easily be detected by the scanning-tunnel-microscope experiment.