Evolution of the Fermi Surface with Carrier Concentration inBi2Sr2CaCu2O8+δ

1996/11/25 by Hong Ding, H. Ding, M. R. Norman +9 · 236 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Chemistry #Condensed matter physics #Cuprate #Electron #Fermi Gamma-ray Space Telescope #Fermi level #Fermi surface #Iron-based superconductors research #Locus (genetics) #Nuclear magnetic resonance #Nuclear physics #Pairing #Photoemission spectroscopy #Physics #Physics of Superconductivity and Magnetism #Pseudogap #Superconductivity #X-ray photoelectron spectroscopy #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.78.2628

published in Physical Review Letters 78(13), 2628-2631 (American Physical Society) · 4 pages, revtex, 4 postscript color figures

arxiv created 1996/11/25 · openalex publication_date 1997/03/31 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We show, by use of angle-resolved photoemission spectroscopy, that underdoped Bi₂Sr₂CaCu₂O_8+\ensuremathδ appears to have a large Fermi surface centered at (\ensuremathπ,\ensuremathπ), even for samples with a T_c as low as 15 K. No clear evidence of a Fermi surface pocket around (\ensuremathπ/2,\ensuremathπ/2) has been found. These conclusions are based on a determination of the minimum gap locus in the pseudogap regime T_c<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.

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