TY - JOUR
T1 - Evolution of the fermi surface with carrier concentration in Bi2Sr2CaCu2O8+δ
AU - Ding, H.
AU - Norman, M. R.
AU - Yokoya, T.
AU - Takeuchi, T.
AU - Randeria, M.
AU - Campuzano, J. C.
AU - Takahashi, T.
AU - Mochiku, T.
AU - Kadowaki, K.
PY - 1997/3/31
Y1 - 1997/3/31
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.78.2628
DO - 10.1103/PhysRevLett.78.2628
M3 - Article
AN - SCOPUS:4244210606
SN - 0031-9007
VL - 78
SP - 2628
EP - 2631
JO - Physical Review Letters
JF - Physical Review Letters
IS - 13
ER -