corner
corner
APS » Journals » Phys. Rev. B » Volume 76 » Issue 2
< Previous Article | Next Article >

Phys. Rev. B 76, 024502 (2007) [4 pages]

Disentangling surface and bulk photoemission using circularly polarized light

Download: PDF (495 kB) Buy this article Export: BibTeX or EndNote (RIS)

V. B. Zabolotnyy1, S. V. Borisenko1, A. A. Kordyuk1,2, D. S. Inosov1, A. Koitzsch1, J. Geck1, J. Fink1, M. Knupfer1, B. Büchner1, S.-L. Drechsler1, V. Hinkov3, B. Keimer3, and L. Patthey4
1Institute for Solid State Research, IFW-Dresden, P.O.Box 270116, D-01171 Dresden, Germany
2Institute of Metal Physics of National Academy of Sciences of Ukraine, 03142 Kyiv, Ukraine
3Max-Planck Institut für Festkörperforschung, D-70569 Stuttgart, Germany
4Swiss Light Source, Paul Scherrer Institut, CH-5234 Villigen, Switzerland

Received 21 February 2007; published 5 July 2007

We show that in angle resolved photoemission spectroscopy (ARPES), near-surface induced fields can be useful for disentangling the surface and bulk related emission. The jump of the dielectric function at the interface results in a nonzero term div A in the photoemission matrix element. The term happens to be significant approximately within the first unit cell and leads to circular dichroism for the states localized therein. As an example we use ARPES spectra of an YBa2Cu3O7−δ crystal to distinguish between the overdoped surface related component and its bulk counterparts.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.76.024502
DOI:
10.1103/PhysRevB.76.024502
PACS:
74.25.Jb, 74.72.Hs, 79.60.−i
 
< Previous Article | Next Article >