title: Anomalous d-like surface resonances on Mo(110) analyzed by time-of-flight momentum microscopy.
abstract: The electronic surface states on Mo(110) have been investigated using time-of-flight momentum microscopy with synchrotron radiation (hν=35 eV). This novel angle-resolved photoemission approach yields a simultaneous acquisition of the E-vs-k spectral function in the full surface Brillouin zone and several eV energy interval. (kx,ky,EB)-maps with 3.4 Å(-1) diameter reveal a rich structure of d-like surface resonances in the spin-orbit induced partial band gap. Calculations using the one-step model in its density matrix formulation predict an anomalous state with Dirac-like signature and Rashba spin texture crossing the bandgap at Γ¯ and EB=1.2 eV. The experiment shows that the linear dispersion persists away from the Γ¯-point in an extended energy- and k∥-range. Analogously to a similar state previously found on W(110) the dispersion is linear along H¯-Γ¯-H¯ and almost zero along N¯-Γ¯-N¯. The similarity is surprising since the spin-orbit interaction is 5 times smaller in Mo. A second point with unusual topology is found midway between Γ¯ and N¯. Band symmetries are probed by linear dichroism.
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, D-55128 Mainz, Germany.
authors.forename: S V
authors.initials: SV
authors.lastname: Chernov
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, D-55128 Mainz, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Medjanik
authors.affiliation: Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Tusche
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, D-55128 Mainz, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Kutnyakhov
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, D-55128 Mainz, Germany.
authors.forename: S A
authors.initials: SA
authors.lastname: Nepijko
authors.affiliation: Surface Concept GmbH, Am Sägewerk 23A, D-55124 Mainz, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Oelsner
authors.affiliation: Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, D-81377 München, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Braun
authors.affiliation: Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, D-81377 München, Germany; New Technologies-Research Center, University of West Bohemia, Univerzitni 8, 306 14 Pilsen, Czech Republic.
authors.forename: J
authors.initials: J
authors.lastname: Minár
authors.affiliation: Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, D-81377 München, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Borek
authors.affiliation: Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, D-81377 München, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Ebert
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, D-55128 Mainz, Germany.
authors.forename: H J
authors.initials: HJ
authors.lastname: Elmers
authors.affiliation: Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Kirschner
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, D-55128 Mainz, Germany. Electronic address: schoenhe@uni-mainz.de.
authors.forename: G
authors.initials: G
authors.lastname: Schönhense
keywords: ARPES; Dirac state; Linear dichroism; Mo(110); Momentum microscopy; Surface resonance