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

✍ Scribed by V.B. Zabolotnyy; S.V. Borisenko; A.A. Kordyuk; J. Fink; J. Geck; A. Koitzsch; M. Knupfer; B. Büchner; H. Berger; A. Erb; C.T. Lin; B. Keimer; R. Follath

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 195 KB
• Volume: 460-462
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2007.03.179

✦ Synopsis

The Cu substitution by Zn and Ni impurities and its influence on the mass renormalization effects in angle resolved photoelectron spectra (ARPES) of Bi 2 Sr 2 CaCu 2 O 8+d 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.