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Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 39: Poster Tuesday: 2D Materials

O 39.8: Poster

Dienstag, 2. April 2019, 18:00–20:00, Poster D

Luttinger liquid in a box: spectral signature of spin-charge separation in MoS2 mirror twin boundaries — •Philipp Weiß1, Wouter Jolie2,3, Clifford Murray2, Joshua Hall2, Fabian Portner1, Nicolae Atodiresei4, Arkady Krasheninnikov5,6, Carsten Busse2,3,7, Hannu-Pekka Komsa6, Thomas Michely2, and Achim Rosch11Institute for Theoretical Physics, University of Cologne, Germany — 2II. Physikalisches Institut, University of Cologne, Germany — 3Institut für Materialphysik, Westfälische Wilhelms-Universität Münster, Germany — 4Peter Grünberg Institute and Institute for Advanced Simulation, Forschungszentrum Jülich, Germany — 5Helmholtz-Zentrum Dresden-Rossendorf, Germany — 6Department of Applied Physics, Aalto University, Finland — 7Department Physik, Universität Siegen, Germany

Electrons in one dimension are expected to fractionalize into spin and charge degrees of freedom. A candidate for the realization of a one-dimensional electron system are mirror twin boundaries in MoS2. Scanning tunneling spectroscopy indicates the doubling of states, well separated in energy due to the finite length of the boundaries.

To uncover the nature of these states we calculate the local density of states of interacting electrons in a box, using Tomonaga-Luttinger liquid theory. Comparison with the experimental spectra allows us to identify the doubled states as emergent spin and charge excitations.

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