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We report low-temperature scanning tunneling microscopy and spectroscopy on high quality Bi 2 Sr 2 Ca 2 Cu 3 O 10+δ crystals. We present atomic-resolution topography and show spectroscopic data acquired on two different samples. In one case, we obtained an extremely homogeneous sample with T c =109K and a transition width of only 1K, and with Δ¯p=60meV...
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