@article{oai:kyutech.repo.nii.ac.jp:00000421,
 author = {Kishine, Junichiro and 岸根, 順一郎 and Lee, Patrick A and Wen, Xiao-Gang},
 issue = {6},
 journal = {Physical review B. Condensed matter and materials physics},
 month = {Jan},
 note = {Based on the SU(2) lattice-gauge-theory formulation of the t-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 (χij) and pairing (Δij) 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 χij and Δij 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.},
 pages = {064526-1--064526-22},
 title = {Signature of the staggered flux state around a superconducting vortex in underdoped cuprates},
 volume = {65},
 year = {2002},
 yomi = {キシネ, ジュンイチロウ}
}