BSCCO superconductors : hole-like fermi surface and doping dependence of the gap function.

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We use the gradient of the energy-integrated angle resolved photoemission (ARPES) intensity in order to define precisely the Fermi surface (FS) in BSCCO superconductors. We show that, independent of the photon energy, the FS is a hole barrel centered at ({pi},{pi}), Then, the superconducting gap along the FS is precisely determined from ARPES measurements on over-doped and underdoped samples of Bi2212. As the doping decreases, the maximum gap increases, but the slope of the gap near the nodes decreases. Though consistent with d-wave symmetry, the gap with underdoping cannot be fit by the simple cos(k{sub x})-cos(k{sub y}) form. A comparison ... continued below

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8 p.

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Campuzano, J. C.; Ding, H.; Fretwell, H. M.; Kadowaki, K.; Kaminski, A.; Mesot, J. et al. August 18, 1999.

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We use the gradient of the energy-integrated angle resolved photoemission (ARPES) intensity in order to define precisely the Fermi surface (FS) in BSCCO superconductors. We show that, independent of the photon energy, the FS is a hole barrel centered at ({pi},{pi}), Then, the superconducting gap along the FS is precisely determined from ARPES measurements on over-doped and underdoped samples of Bi2212. As the doping decreases, the maximum gap increases, but the slope of the gap near the nodes decreases. Though consistent with d-wave symmetry, the gap with underdoping cannot be fit by the simple cos(k{sub x})-cos(k{sub y}) form. A comparison of our ARPES results with available penetration depth data indicates that the renormalization of the linear T suppression of the superfluid density at low temperatures due to quasiparticle excitations around the d-wave nodes is large and doping dependent.

Physical Description

8 p.

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OSTI as DE00011940

Medium: P; Size: 8 pages

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  • Physics and Chemistry of Molecular and Oxide Superconductors International Conference, Stockholm (SE), 07/28/1999--08/02/1999

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  • Report No.: ANL/MSD/CP-99834
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 11940
  • Archival Resource Key: ark:/67531/metadc623407

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  • August 18, 1999

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  • June 16, 2015, 7:43 a.m.

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  • April 11, 2017, 3:53 p.m.

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Campuzano, J. C.; Ding, H.; Fretwell, H. M.; Kadowaki, K.; Kaminski, A.; Mesot, J. et al. BSCCO superconductors : hole-like fermi surface and doping dependence of the gap function., article, August 18, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc623407/: accessed December 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.