Unusual Dispersion and Line Shape of the Superconducting State Spectra of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}

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

DOI:https://doi.org/10.1103/PhysRevLett.79.3506· OSTI ID:554001

Norman, M R; Ding, H; Campuzano, J C; Takeuchi, T ^[1]; Ding, H; Campuzano, J C ^[2]; Takeuchi, T ^[3]; Randeria, M ^[4]; Yokoya, T; Takahashi, T ^[5]; Mochiku, T; Kadowaki, K ^[6]; Kadowaki, K ^[7]

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1. Materials Sciences Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Department of Physics, University of Illinois at Chicago, Chicago, Illinois 60607 (United States)
3. Department of Crystalline Materials Science, Nagoya University, Nagoya 464-01 (Japan)
4. Tata Institute of Fundamental Research, Bombay 400005 (India)
5. Department of Physics, Tohoku University, 980 Sendai (Japan)
6. National Research Institute for Metals, Sengen, Tsukuba, Ibaraki 305 (Japan)
7. Institute of Materials Science, University of Tsukuba, Ibaraki 305 (Japan)

Photoemission spectra of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} below T{sub c} show two features near the ({pi},0) point of the zone: a sharp peak at low energy and a higher binding energy hump. We find that the sharp peak persists at low energy even as one moves towards (0,0), while the broad hump shows significant dispersion which correlates well with the normal state dispersion. We argue that these features are naturally explained by the interaction of electrons with a sharp mode which appears only below T{sub c}, and speculate that the latter may be related to the resonance seen in recent neutron data. {copyright} {ital 1997} {ital The American Physical Society}

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 554001
• 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
BINDING ENERGY
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
DISPERSION RELATIONS
ELECTRON-ELECTRON INTERACTIONS
HIGH-TC SUPERCONDUCTORS
LINE WIDTHS
PHOTOEMISSION
SPECTRAL FUNCTIONS
STRONTIUM OXIDES