Evolution of the fermi surface with carrier concentration in Bi2Sr2CaCu2O8+δ

H. Ding, M. R. Norman, T. Yokoya, T. Takeuchi, M. Randeria, J. C. Campuzano, T. Takahashi, T. Mochiku, K. Kadowaki

Research output: Contribution to journalArticlepeer-review

240 Citations (Scopus)


We show, by use of angle-resolved photoemission spectroscopy, that underdoped Bi2Sr2CaCu2O8+δ appears to have a large Fermi surface centered at (π, π), even for samples with a Tc as low as 15 K. No clear evidence of a Fermi surface pocket around (π/2, π/2) has been found. These conclusions are based on a determination of the minimum gap locus in the pseudogap regime Tc < T < T*, which is found to coincide with the locus of gapless excitations in momentum space (Fermi surface) determined above T* . These results suggest that the pseudogap is more likely of precursor pairing rather than magnetic origin.

Original languageEnglish
Pages (from-to)2628-2631
Number of pages4
JournalPhysical Review Letters
Issue number13
Publication statusPublished - 1997 Mar 31


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