Dresden 2026 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 42: Other Transport Topics
TT 42.12: Vortrag
Mittwoch, 11. März 2026, 12:30–12:45, HSZ/0105
Electromagnetic chiral anisotropy of the semiconducting LaRhC2-enantiomorphs — •Volodymyr Levytskyi1, Ulrich Burkhardt2, Markus König2, Eteri Svanidze2, Yuri Grin2, and Roman Gumeniuk1 — 1Institut für Experimentelle Physik, TU Bergakademie Freiberg, Freiberg, Germany — 2Max-Planck-Institut für Chemische Physik fester Stoffe, Dresden, Germany
In past decades, the majority of research is focused on chiral crystalline solids due to their non-trivial spin and charge transport properties. However, the preparation of mono-chiral samples is a complicated task – perhaps explaining why the influence of chirality on electrical properties has remained almost unexplored. EBSD (electron backscatter diffraction) -based enantiomorph distribution maps allow the extraction and shaping of suitable microdevices from polycrystalline material by the FIB (focused ion beam) micropreparation method. Here, we present results on the electrical transport studied on the mono-chiral, crystallographically oriented, single-crystalline LaRhC2 (space groups P41 or P43) microdevices. Significant anisotropy of the electrical resistivity is observed for each enantiomorph, both parallel to and normal to the fourfold screw axis. The different linear coefficients of the longitudinal magnetoresistivity probed along the fourfold screw axis for the nonmagnetic right-handed (41-axis) and left-handed (43-axis) LaRhC2 crystals in the oriented magnetic field parallel and antiparallel to the current flow direction (dc regime), confirm the electromagnetic chiral anisotropy (eMChA) – a rarely studied effect.
Keywords: chiral semiconductor; single crystal; electrical transport; electromagnetic chiral anisotropy