Fermi arc in the superconducting state of impurity-doped Bi2 Sr2 CaCu2 O8

T. Sato; K. Terashima; K. Nakayama; S. Souma; T. Takahashi; T. Yamamoto; K. Kadowaki

doi:10.1103/PhysRevB.78.100502

Fermi arc in the superconducting state of impurity-doped Bi2 Sr2 CaCu2 O8

T. Sato, K. Terashima, K. Nakayama, S. Souma, T. Takahashi, T. Yamamoto, K. Kadowaki

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

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.

Original language	English
Article number	100502
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	78
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.78.100502
Publication status	Published - Sep 4 2008
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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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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Fermi arc in the superconducting state of impurity-doped Bi2 Sr2 CaCu2 O8

Abstract

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