Effect of Zn and Ni impurities on the quasiparticle renormalization in Bi2Sr2CaCu2O8+δ

• Published in: Physica. C, Superconductivity Superconductivity, 2007-09, Vol.460-462 (2), p.882-883
• Main Authors: ZABOLOTNYY, V. B, BORISENKO, S. V, LIN, C. T, KEIMER, B, FOLLATH, R, KORDYUK, A. A, FINK, J, GECK, J, KOITZSCH, A, KNUPFER, M, BÜCHNER, B, BERGER, H, ERB, A
• Format: Article
• Language: English
• Subjects: Bi-based cuprates; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cuprates superconductors (high tc and insulating parent compounds); Exact sciences and technology; Physics; Properties of type I and type II superconductors; Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.); Superconductivity
• ISSN: 0921-4534; 1873-2143
• DOI: 10.1016/j.physc.2007.03.179

The Cu substitution by Zn and Ni impurities and its influence on the mass renormalization effects in angle resolved photoelectron spectra (ARPES) of Bi2Sr2CaCu2O8+delta is addressed. We show that the nonmagnetic Zn atoms have much stronger effect both in nodal and antinodal parts of the Brillouin zone than magnetic Ni. The observed changes are consistent with the behaviour of the spin resonance mode as seen by inelastic neutron scattering in YBCO-123. This strongly suggests that the 'peak-dip-hump' and the 'kink' in ARPES on the one side and neutron resonance on the other are closely related features.