Laser based angle-resolved photoemission, the sudden approximation, and quasiparticle-like spectral peaks in Bi2Sr2CaCu2O(8+delta). Journal Article uri icon

Overview

abstract

  • A new low photon energy regime of angle-resolved photoemission spectroscopy is accessed with lasers and used to study the high T(C) superconductor Bi2Sr2CaCu2O(8+delta). The low energy increases bulk sensitivity, reduces background, and improves resolution. With this we observe spectral peaks which are sharp on the scale of their binding energy--the clearest evidence yet for quasiparticles in the normal state. Crucial aspects of the data such as the dispersion, superconducting gaps, and the bosonic coupling kink are found to be robust to a possible breakdown of the sudden approximation.

publication date

  • January 1, 2006

Full Author List

  • Koralek JD; Douglas JF; Plumb NC; Sun Z; Fedorov AV; Murnane MM; Kapteyn HC; Cundiff ST; Aiura Y; Oka K

Other Profiles

Additional Document Info

start page

  • 017005

volume

  • 96

issue

  • 1