Quasi-particle structure around a single vortex in high-Tc superconductors

✍ Scribed by S. Tomita; M. Kato; K. Maki

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 657 KB
• Volume: 469
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2009.05.155

✦ Synopsis

For analyzing the checker-board like modulation of the local density of states (LDOS) around a vortex observed in the slightly overdoped Bi 2 Sr 2 CaCu 2 O x , we examined the effect of pseudogap state of high-T c superconductors to the LDOS around the vortex. We first derived the Bogoliubov-de Gennes equation for d-wave superconductivity (d-SC) in the presence of d-spin density wave (d-SDW). Using the Fourier-Bessel expansion, we solved this equation for a single vortex state, numerically. We found that the peak of the bound states around E = 0 becomes small and modulation of the LDOS is observed for larger d-SDW order parameter.