Evolution of the Fermi Surface with Carrier Concentration in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}

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

DOI:https://doi.org/10.1103/PhysRevLett.78.2628· OSTI ID:532629

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

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

We show, by use of angle-resolved photoemission spectroscopy, that underdoped Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} appears to have a large Fermi surface centered at ({pi},{pi}), even for samples with a T{sub c} as low as 15K. No clear evidence of a Fermi surface pocket around ({pi}/2,{pi}/2) has been found. These conclusions are based on a determination of the minimum gap locus in the pseudogap regime T{sub c}{lt}T{lt}T{sup *}, which is found to coincide with the locus of gapless excitations in momentum space (Fermi surface) determined above T{sup *}. These results suggest that the pseudogap is more likely of precursor pairing rather than magnetic origin. {copyright} {ital 1997} {ital The American Physical Society}

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 532629
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 13 Vol. 78; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
BISMUTH OXIDES
CALCIUM OXIDES
CHARGE CARRIERS
COPPER OXIDES
ELECTRON SPECTRA
FERMI LEVEL
HIGH-TC SUPERCONDUCTORS
Luttinger liquid
PHOTOEMISSION
STRONTIUM OXIDES
SYNCHROTRON RADIATION