Momentum Dependence of the Superconducting Gap inBi2Sr2CaCu2 | Zendy

Hong Ding | Zendy; J. C. Campuzano | Zendy; A. F. Bellman | Zendy; T. Yokoya | Zendy; M. R. Norman | Zendy; Mohit Randeria | Zendy; T. Takahashi | Zendy; Hiroshi KatayamaYoshida | Zendy; T. Mochiku | Zendy; K. Kadowaki | Zendy; G. Jennings | Zendy

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Momentum Dependence of the Superconducting Gap inBi2Sr2CaCu2<…

Author(s) -

Hong Ding,

J. C. Campuzano,

A. F. Bellman,

T. Yokoya,

M. R. Norman,

Mohit Randeria,

T. Takahashi,

Hiroshi KatayamaYoshida,

T. Mochiku,

K. Kadowaki,

G. Jennings

Publication year - 1995

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.74.2784

Subject(s) - physics , order (exchange) , superconductivity , condensed matter physics , economics , finance

We measure the momentm dependence of the superconducting gap along the Fermi surface of Bi2Sr2CaCu2O8 by high resolution angle-resolved photoemission spectroscopy. The gap is large in the vicinity of the M̅ point (where γ- M̅ is along the Cu-O bond), and small along the γ- X and γ- Y (π,π) directions. However, the gap is not zero along these directions, but, within our accuracy, becomes zero about 10∘ on either side of the (π,π) directions. We discuss the implications of these results for the symmetry of the order parameter

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