Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 50: Poster: Nanostructures on Surfaces II
O 50.4: Poster
Dienstag, 13. März 2018, 18:15–20:30, Poster B
Spectral signatures of spin-charge separation in MoS2 mirror twin boundaries — •Philipp Weiß1, Wouter Jolie2,3, Clifford Murray2, Joshua Hall2, Arkady Krasheninnikov4, Hannu-Pekka Komsa5, Carsten Busse2,3,6, Thomas Michely2, and Achim Rosch1 — 1Institute for Theoretical Physics, University of Cologne, Germany — 2Institute of Physics II, University of Cologne, Germany — 3Institut für Materialphysik, Westfälische Wilhelms-Universität Münster, Germany — 4Helmholtz-Zentrum Dresden-Rossendorf, Germany — 5Department of Applied Physics, Aalto University, Finland — 6Department Physik, Universität Siegen, Germany
We calculate the local spectral density of a one-dimensional metallic wire of finite length as predicted by Luttinger liquid theory. Fourier transformation in space yields the linear dispersion of spin and charge density waves which are the fundamental excitations of the system.
We apply this theory to recent STM measurements in MoS2 mirror twin boundaries. Due to the metallic nature of these one-dimensional structures one can expect to find signatures of spin-charge separation in the STM signal. By means of the Fourier analysis we are able to extract spin and charge velocities from the experimental data. This indicates that a Luttinger liquid is likely realized in such grain boundaries.