Regensburg 2025 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 37: Correlated Electrons: Poster

TT 37.21: Poster

Mittwoch, 19. März 2025, 15:00–18:00, P4

Temperature Dependent Infrared Spectroscopy on the Frustrated Spin-Ladder System BiCu₂PO₆ — •Johanna Strauß¹, Renjith Mathew Roy¹, Maxim Wenzel¹, Haidong Zhou², Martin Dressel¹, and Komalavalli Thirunavukkuarasu³ — ¹1. Physikalisches Institute, University of Stuttgart, Germany — ²Department of Physics, University of Tennessee Knoxville, Knoxville, USA — ³3. Department of Physics, Florida A and M University, Tallahassee, USA

Spin systems with frustrated geometries are of significant interest due to their potential to exhibit quantum spin liquid behaviour. This study focuses on BiCu₂PO₆ which exhibits no magnetic ordering down to 0.1 K. Various experimental studies on this zig-zag spin-ladder compound reveal that the magnetism in this material arise from complex exchange coupling mechanisms that are not completely understood yet. However, it is clear that the magneto-structural correlations play a major role. Here, we present our attempt to employ infrared spectroscopy to determine the optical conductivity and phonons along planes parallel and perpendicular to the spin-ladders at temperatures ranging from 300 K to 10 K and look for signatures on the nature of spin-phonon coupling.

Keywords: frustrated spin-ladder; infrared spectroscopy; low temperature; optical conductivity