Topology of the Pseudogap and Shadow Bands in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} at Optimum Doping

Journal Article · Sat Nov 01 04:00:00 EST 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.3467· OSTI ID:554000

Saini, N L ^[1]; Avila, J ^[2]; Bianconi, A; Lanzara, A ^[3]; Asensio, M C ^[4]; Tajima, S; Gu, G D; Koshizuka, N ^[5]

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1. Istituto Nazionale di Fisica Nucleare (INFN) and Universita di Roma La Sapienza, P. A. Moro 2, 00185 Roma (Italy)
2. LURE, Bat 209D Universite Pairs-Sud, F-91405 Orsay (France)
3. Dipartimento di Fisica, Universita di Roma La Sapienza, P.A. Moro 2, 00185 Roma (Italy)
4. LURE and Instituto de Ciencia de Materials de Madrid, CSIC, 28049 Madrid (Spain)
5. Superconductivity Research Laboratory, ISTEC, Shinonome 1-10-13 Koto -ku, Tokyo 135 (Japan)

We report topology of the Fermi surface of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} superconducting system at the optimum doping determined by sequential angle-scanning photoemission combined with high intensity of synchrotron radiation. The Fermi surface at the optimum doping has a pseudogap around ({pi},0) as in underdoped samples, showing missing segments near the M points, and shadow bands around (0.5{pi},0.5{pi}) and equivalent locations. The k dependence of the pseudogap shows a particular asymmetric topology that imposes a strong constraint on its theoretical explanation. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 554000
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRYSTAL DOPING
ELECTRONIC STRUCTURE
ENERGY GAP
FERMI LEVEL
HIGH-TC SUPERCONDUCTORS
PHOTOEMISSION
STRONTIUM OXIDES
SYNCHROTRON RADIATION