Imaging the Vortex Density of States in Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$

ORAL

Abstract

We use a low temperature scanning tunneling microscope (STM) to image vortices in the high temperature superconductor Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$, in magnetic fields up to 9T. We locate the vortices via their increased local density of states near $\pm$7 meV. We investigate the dependence of the vortex halo on several parameters, including applied magnetic field and proximity to surface impurities.

*This work was supported by the Air Force Office of Scientific Research under grant FA9550-05-1-0371, and by the NSF under grant DMR-0508812.

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Authors

  • Yi Yin

  • M. Zech

  • T. L. Williams

    • Harvard University

  • Genda Gu

    • Brookhaven National Laboratory

  • J. E. Hoffman

    • Harvard University