Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 8: Electronic Structure and Spin-Orbit Interaction I
O 8.3: Vortrag
Montag, 31. März 2014, 11:00–11:15, GER 38
Rashba-split surface states of (√3× √3)Pb/Ag(111)R30∘ — •Lydia El-Kareh1, Gustav Bihlmayer2, Arne Buchter3, Hendrik Bentmann3, Friedrich Reinert3, Stefan Blügel2, and Matthias Bode1 — 1Physikalisches Institut, Experimentelle Physik II, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany — 2Peter Grünberg Institut and Institute of Advanced Simulation, Forschungszentrum Jülich and JARA, D-52425 Jülich, Germany — 3Physikalisches Institut, Experimentelle Physik VII, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
We report on a combined low-temperature scanning tunneling spectroscopy (STS),
angle-resolved photoemission spectroscopy (ARPES),
and density functional theory (DFT) investigation
of the (√3× √3)R30∘ Pb/Ag(111) surface alloy
which provides a giant Rashba-type spin-splitting [1,2].
By means of STS and quantum interference mapping we determined
the band onsets, splitting strengths, and dispersions for two Rashba-split bands.
The unambiguous assignment of scattering vectors
is achieved by comparison to ARPES measurements.
The detailed analysis of the spin and orbital character of both bands
as obtained by DFT calculations allows to solve an apparent deviation
between experimentally observed scattering events
and the theoretically predicted spin polarization [3].
D. Pacilé et al., Phys. Rev. B 73, 245429 (2006).
G. Bihlmayer et al., Phys. Rev. B 75, 195414 (2007).
L. El-Kareh et al., Phys. Rev. Lett. 110, 176803 (2013).