title: Spin texture of time-reversal symmetry invariant surface states on W(110).
abstract: We find in the case of W(110) previously overlooked anomalous surface states having their spin locked at right angle to their momentum using spin-resolved momentum microscopy. In addition to the well known Dirac-like surface state with Rashba spin texture near the -point, we observe a tilted Dirac cone with circularly shaped cross section and a Dirac crossing at 0.28 ×   within the projected bulk band gap of tungsten. This state has eye-catching similarities to the spin-locked surface state of a topological insulator. The experiments are fortified by a one-step photoemission calculation in its density-matrix formulation.
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany.
authors.forename: D
authors.initials: D
authors.lastname: Kutnyakhov
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Chernov
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Medjanik
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Wallauer
authors.affiliation: Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany.|Forschungszentrum Jülich, Peter Grünberg Institut (PGI-6), 52425 Jülich, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Tusche
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany.|Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Ellguth
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany.
authors.forename: S A
authors.initials: SA
authors.lastname: Nepijko
authors.affiliation: Helmholtz-Zentrum Berlin für Materialien und Energie, Elektronenspeicherring BESSY II, Albert-Einstein-Str. 15, 12489 Berlin, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Krivenkov
authors.affiliation: Department Chemie, Physikalische Chemie, Universität München, Butenandtstr. 5-13, 81377 München, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Braun
authors.affiliation: Department Chemie, Physikalische Chemie, Universität München, Butenandtstr. 5-13, 81377 München, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Borek
authors.affiliation: Department Chemie, Physikalische Chemie, Universität München, Butenandtstr. 5-13, 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, Physikalische Chemie, Universität München, Butenandtstr. 5-13, 81377 München, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Ebert
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany.
authors.forename: H J
authors.initials: HJ
authors.lastname: Elmers
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany.
authors.forename: G
authors.initials: G
authors.lastname: Schönhense