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27 April 2024

» pubmed » pmid12786581

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BCS-like Bogoliubov quasiparticles in high-T(c) superconductors observed by angle-resolved photoemission spectroscopy
H Matsui ; T Sato ; T Takahashi ; S-C Wang ; H-B Yang ; H Ding ; T Fujii ; T Watanabe ; A Matsuda ;
Date:	30 May 2003
Journal:	Phys Rev Lett, 90 (21), 217002
Abstract:	We performed high-resolution angle-resolved photoemission spectroscopy on triple-layered high-T(c) cuprate Bi(2)Sr(2)Ca(2)Cu(3)O(10+delta). We have observed the full energy dispersion (electron and hole branches) of Bogoliubov quasiparticles and determined the coherence factors above and below E(F) as a function of momentum from the spectral intensity as well as from the energy dispersion based on BCS theory. The good quantitative agreement between the experiment and the theoretical prediction suggests the basic validity of BCS formalism in describing the superconducting state of cuprates.
Source:	PubMed, pmid12786581
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