Physics – Condensed Matter – Superconductivity
Scientific paper
2010-03-12
Physics Letters A 374 (2010) 3789-3792
Physics
Condensed Matter
Superconductivity
9 pages, 3 figures
Scientific paper
10.1016/j.physleta.2010.07.035
The pattern transition induced by lattice anisotropy (LA) and magnetic impurities is computationally observed in near-optimally doped d-wave superconductors (DSCs). For the single impurity case, a transition from the checkerboard to stripe pattern can be induced even with a very weak LA. Moreover, the modulation period of eight lattice constants (8$a$) in the spin order coincides with neutron scattering data. For the two-impurity case, an orientation transition from the longitudinal impurity-pinned stripe into the transverse pattern is observed when the LA ratio reaches some critical value. At the critical point, it is found that the structures around magnetic impurities could restore checkerboard patterns. These results indicate that the formation of stripes in DSCs might induced by various effects, and could be tunable experimentally.
Gong Chang-De
Zhou Yuan
Zuo Xian-Jun
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