| Bibliographic Citation | |
| Full Text |  402 K |
|---|---|
| Title | BSCCO superconductors : hole-like fermi surface and doping dependence of the gap function. |
| Creator/Author | Campuzano, J. C. ; Ding, H. ; Fretwell, H. M. ; Kadowaki, K. ; Kaminski, A. ; Mesot, J. ; Mochiku, T. ; Norman, M. R. ; Paramekanti, A. ; Randeria, M. ; Sato, T. ; Takahashi, T. ; Takeuchi, T. ; Yokoya, T. |
| Publication Date | 1999 Aug 18 |
| OSTI Identifier | OSTI ID: 11940 |
| Report Number(s) | ANL/MSD/CP-99834 |
| DOE Contract Number | W-31109-ENG-38 |
| Other Number(s) | TRN: AH200119%%135 |
| Resource Type | Conference |
| Resource Relation | Conference: Physics and Chemistry of Molecular and Oxide Superconductors International Conference, Stockholm (SE), 07/28/1999--08/02/1999; Other Information: PBD: 18 Aug 1999 |
| Research Org | Argonne National Lab., IL (US) |
| Sponsoring Org | US Department of Energy (US) |
| Subject | 36 MATERIALS SCIENCE; FERMI LEVEL; PENETRATION DEPTH; PHOTOEMISSION; HIGH-TC SUPERCONDUCTORS; BISMUTH OXIDES; STRONTIUM OXIDES; CALCIUM OXIDES; COPPER OXIDES; ENERGY GAP |
| Description/Abstract | 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. |
| Country of Publication | United States |
| Language | English |
| Format | Medium: P; Size: 8 pages |
| Availability | OSTI as DE00011940 To purchase this media from NTIS, click here |
| System Entry Date | 2008 Feb 04 |
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Last Updated: 11/20/2009