UNIGE document Scientific Article
previous document  unige:26791  next document
add to browser collection
Title

Modeling scanning tunneling spectra of Bi2Sr2CaCu2O8+δ

Authors
Kordyuk, A.A.
Published in Physical Review. B, Condensed Matter. 2003, vol. 67, no. 22, p. 224502
Abstract Recent angle-resolved photoemission spectroscopy (ARPES) and neutron scattering data have provided ingredients for the interpretation of scanning tunneling spectra on Bi2Sr2CaCu2O8+δ. We analyze the low-temperature tunneling spectra, from oxygen overdoped to underdoped samples, including details about the bilayer splitting and the neutron resonance peak. Two van Hove singularities are identified: the first is integrated in the coherence peaks, the second is heavily broadened at higher binding energy. The shape of the tunneling spectra suggests a strong coupling of the quasiparticles with a collective mode, and a comparison with photoemission shows that the scattering rate in tunneling is an order of magnitude smaller than in ARPES. Finally, the theoretical spectra calculated with an isotropic tunneling matrix element are in better agreement with the experimental data than those obtained with anisotropic matrix elements.
Identifiers
Full text
Structures
Citation
(ISO format)
HOOGENBOOM, Bart Wiebren et al. Modeling scanning tunneling spectra of Bi2Sr2CaCu2O8+δ. In: Physical Review. B, Condensed Matter, 2003, vol. 67, n° 22, p. 224502. https://archive-ouverte.unige.ch/unige:26791

163 hits

293 downloads

Update

Deposited on : 2013-03-13

Export document
Format :
Citation style :