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Disentangling surface and bulk photoemission using circularly polarized light

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Inosov,  D. S.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Hinkov,  V.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Keimer,  B.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Zabolotnyy, V. B., Borisenko, S. V., Kordyuk, A. A., Inosov, D. S., Koitzsch, A., Geck, J., et al. (2007). Disentangling surface and bulk photoemission using circularly polarized light. Physical Review B, 76(2): 024502.


Cite as: https://hdl.handle.net/21.11116/0000-000E-B63F-F
Abstract
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-delta crystal to distinguish between the overdoped surface related component and its bulk counterparts.