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MA: Fachverband Magnetismus
MA 20: Altermagnets III
MA 20.2: Vortrag
Dienstag, 10. März 2026, 14:15–14:30, HSZ/0002
Strain controlled g -to d-wave transition in altermagnetic CrSb — Bennet Karetta1, •Xanthe Verbeek1, Rodrigo Jaeschke-Ubiergo1, Libor Šmejkal2,3,4, and Jairo Sinova1,5 — 1Insitut für Physik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany — 2Max-Planck-Institut für Physik Komplexer Systeme, Nöthnitzer Str. 38, 01187 Dresden, Germany — 3Max-Planck-Institut für Chemische Physik Fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany — 4Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnická 10, Prague 6, Czech Republic — 5Department of Physics, Texas A&M University, College Station, Texas 77843-4242, USA
We demonstrate a strain-induced transition in the g-wave altermagnet CrSb, revealing how shear strain can tune spin symmetries and enable new responses. Focusing on the spin-splitter effect, which allows for pure spin currents but is forbidden in unstrained CrSb, we identify four shear-strain directions that lower the symmetry and enable spin conductivity. These strains induce three d-wave altermagnetic states and one uncompensated magnetic phase, each with distinct spin symmetries. Using both a minimal model and first-principles calculations, we confirm the emergence of these phases and show that their key features remain robust in the presence of spin-orbit coupling. We predict a spin-splitter effect of up to 5% under just 1% strain, showing that even small deformations can generate sizable spin-splitter currents. Our findings highlight strain as a precise and effective tool for controlling symmetry-driven spin phenomena in altermagnets.
Keywords: unconventional magnetism; strain engineering; spin currents; symmetry breaking; spintronics