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 | |
| Publication status | Published - Sep 4 2008 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Sato, T., Terashima, K., Nakayama, K., Souma, S., Takahashi, T., Yamamoto, T., & Kadowaki, K. (2008). Fermi arc in the superconducting state of impurity-doped Bi2 Sr2 CaCu2 O8. Physical Review B - Condensed Matter and Materials Physics, 78(10), [100502]. https://doi.org/10.1103/PhysRevB.78.100502