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.