Fermi arc in the superconducting state of impurity-dopedBi2Sr2CaCu2O8 | Zendy

T. Sato | Zendy; Kensei Terashima | Zendy; K. Nakayama | Zendy; S. Souma | Zendy; T. Takahashi | Zendy; Takashi Yamamoto | Zendy; Kazunori Kadowaki | Zendy

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Fermi arc in the superconducting state of impurity-dopedBi2Sr2CaCu2O8

Author(s) -

T. Sato,

Kensei Terashima,

K. Nakayama,

S. Souma,

T. Takahashi,

Takashi Yamamoto,

Kazunori Kadowaki

Publication year - 2008

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.78.100502

Subject(s) - superconductivity , doping , impurity , condensed matter physics , physics , fermi level , materials science , fermi liquid theory , photoemission spectroscopy , nuclear magnetic resonance , nuclear physics , x ray photoelectron spectroscopy , quantum mechanics , electron

We have performed ultrahigh energy- and momentum-resolved angle-resolved photoemission spectroscopy of impurity-doped Bi2Sr2CaCu2O8. We found that the point node of the superconducting gap near the (pi/2,pi/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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