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This paper reports scanning tunneling spectroscopy (STS) and the Raman scattering (RS) investigations of Bi 2 Sr 2 CaCu 2 O 8 (BSCCO) single crystals. STS measurements of the local I-V characteristics on the cleaved surface of BSCCO show both the metallic Cu-O and semiconducting Bi-O features. The width of the semiconducting gap was estimated to be 0.3 eV at room...
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