Atomic Scale Imaging and Spectroscopy of a CuO_2 Plane at the Surface of Bi_2Sr_2CaCu_2O_{8+delta}

Details Atomic Scale Imaging and Spectroscopy of a CuO_2 Plane at the Surface of Bi_2Sr_2CaCu_2O_{8+delta} Atomic Scale Imaging and Spectroscopy of a CuO_2 Plane at the Surface of Bi_2Sr_2CaCu_2O_{8+delta}

2002-08-03

arxiv.org/abs/cond-mat/0208053v1

Physics

Condensed Matter

Superconductivity

to be published in PRL vol. 89, issue 8

Scientific paper

10.1103/PhysRevLett.89.087002

We have used a scanning tunneling microscope to demonstrate that a single CuO_2 plane can form a stable and atomically ordered layer at the surface of Bi_2Sr_2CaCu_2O_{8+delta}. In contrast to previous studies on high-T_c surfaces, the CuO_2-terminated surface exhibits a strongly suppressed tunneling conductance at low voltages. We consider a number of different explanations for this phenomena and propose that it may be caused by how the orbital symmetry of the CuO_2 plane's electronic states affects the tunneling process.

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