TY - JOUR
T1 - Fermi arc in the superconducting state of impurity-doped Bi2 Sr2 CaCu2 O8
AU - Sato, T.
AU - Terashima, K.
AU - Nakayama, K.
AU - Souma, S.
AU - Takahashi, T.
AU - Yamamoto, T.
AU - Kadowaki, K.
PY - 2008/9/4
Y1 - 2008/9/4
N2 - We have performed ultrahigh energy- and momentum-resolved angle-resolved photoemission spectroscopy of impurity-doped Bi2 Sr2 CaCu2 O8. We found that the point node of the superconducting gap near the (π/2,π/2) point in a pristine sample gradually evolves into a small gapless Fermi arc upon Zn or Ni doping. The shape of impurity-induced density of states inside the superconducting gap shows a marked difference between Zn and Ni doping, demonstrating that the low-energy excitation properties are strongly sensitive to the character of impurities.
AB - We have performed ultrahigh energy- and momentum-resolved angle-resolved photoemission spectroscopy of impurity-doped Bi2 Sr2 CaCu2 O8. We found that the point node of the superconducting gap near the (π/2,π/2) point in a pristine sample gradually evolves into a small gapless Fermi arc upon Zn or Ni doping. The shape of impurity-induced density of states inside the superconducting gap shows a marked difference between Zn and Ni doping, demonstrating that the low-energy excitation properties are strongly sensitive to the character of impurities.
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U2 - 10.1103/PhysRevB.78.100502
DO - 10.1103/PhysRevB.78.100502
M3 - Article
AN - SCOPUS:51749108376
SN - 1098-0121
VL - 78
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 10
M1 - 100502
ER -