Berlin 2024 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 84: Electronic Structure of Surfaces I: Spectroscopy, Surface States
O 84.8: Vortrag
Donnerstag, 21. März 2024, 12:15–12:30, MA 144
Utilizing matrix element effects to study the orbital texture of Dirac surface state in PtTe2 — •Muthu P. T. Masilamani1, Jakub Schusser1, Mohammed Qahosh2, Lukasz Plucinski2, Begmuhammet Geldiyev1, and Friedrich Reinert1 — 1Experimentelle Physik VII and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg, Würzburg, Germany — 2Peter Grünberg Institut (PGI-6), Forschungszentrum Jülich GmbH, Jülich, Germany
In this work, we study the matrix element effect of the ARPES intensity to deduce k-space initial state orbital texture featuring different symmetries in type-II Dirac semimetal PtTe2. Our spin- and angle-resolved photoemission data were augmented by the one-step model of the photoemission within the spin-polarized relativistic Korringa-Kohn-Rostoker (SPR-KKR) Green’s function method of the Munich band structure software package. In order to extract information about the different contributions to the resulting spectral weight and spin-polarization, the matrix element used in our one-step model of photoemission calculations includes all experimental parameters such as photon energy, light polarization and geometry configurations. Via such control over the experimental parameters, in order to investigate the orbital wavefunction above and below the Dirac point, we performed polarization-dependent ARPES calculations where we varied the angle of the crystal mirror plane with respect to the experimental mirror plane.
Keywords: ARPES; matrix-element effects; type-II Dirac semimetal; PtTe2; SPR-KKR Green's function method