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TT: Fachverband Tiefe Temperaturen
TT 59: 2D Materials V – Magnetic, spintronic, and topological properties (joint session HL/TT)
TT 59.7: Vortrag
Mittwoch, 11. März 2026, 17:00–17:15, POT/0081
Study of the non-trivial spin texture in Tellurium and the consequences in charge-spin interconversion — •Andrés Martínez-García1, Daniel Gosálvez-Martínez1, Carlos Sabater1, and Juan José Palacios2 — 1Departamento de Física and Instituto Universitario de Materiales de Alicante (IUMA), Universidad de Alicante, Alicante, Spain. — 2Departamento de Física de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Madrid, Spain.
Tellurium is a chiral semiconducting material with a narrow band gap that can be synthesized with well-defined handedness in nanowires and flakes, making it an excellent platform for studying chirality-related charge-spin interconversion in nanodevices. The coupling between charge and spin degrees of freedom is closely connected to the spin texture in momentum space. In this work, we demonstrate that tellurium exhibits a nontrivial radial spin texture at the top of the valence band, where the spin polarization aligns parallel to the HK direction of the Brillouin zone, while spins in the perpendicular ZHL plane display a nontrivial winding. We investigate the electronic transport and resulting spin polarization within the Landauer transport formalism using first-principles calculations. This approach allows us to map the transport properties along each crystallographic direction and to identify correlations between the spin polarization of the induced current and the underlying momentum-space spin texture. Our results provide microscopic insight into chirality-driven spin responses in tellurium and highlight its potential for spintronic applications.
Keywords: Tellurium; Spin Texture; Spin Orbit Coupling; Quantum Transport