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POSITRON ANNIHILATION STUDY ON SUPERCONDUCTING SINGLE CRYSTAL BSCCO

POSITRON ANNIHILATION STUDY ON SUPERCONDUCTING SINGLE CRYSTAL BSCCO
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摘要 Ⅰ. INTRODUCTIONPositron annihilation spectroscopy (PAS)is a sensitive probe for investigation of the electronic structure, the defects and phase transition of solids. For conventional superconductors, the BCS theory predicts a redistribution of occupied states in k space due to the formation of Cooper pairs. The formation of Cooper pair leads to a smearing of the Fermi surface. Early theories suggested that one should observe an increase in
出处 《Chinese Science Bulletin》 SCIE EI CAS 1992年第8期646-650,共5页
基金 Project supported by the National Center of Research and Development on Superconductivity of China
关键词 high temperature SUPERCONDUCTOR single crystal POSITRON annihilation. HIGH TEMPERATURE SUPERCONDUCTOR SINGLE CRYSTAL POSITRON ANNIHILATION
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