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MA: Fachverband Magnetismus

MA 52: Altermagnets

MA 52.12: Vortrag

Freitag, 22. März 2024, 12:30–12:45, EB 202

Altermagnetic band splitting in CrSb thin films investigated by photoemission spectroscopy — •Lukas Odenbreit¹, Sonka Reimers¹, Libor Smejkal¹, Vladimir Strocov², Procopios Constantinou², Anna Hellenes¹, Rodrigo Jaeschke Ubiergo¹, Warlley Campos¹, Venkata Bharadwaj¹, Atasi Chakraborty¹, Mathias Kläui¹, Jairo Sinova¹, and Martin Jourdan¹ — ¹Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099Mainz, Germany — ²Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland

Altermagnets are characterized by a collinear magnetic phase with compensated order in real space and alternating spin polarization in reciprocal space.

Using spin-integrated soft X-ray angular resolved photoemission spectroscopy (SX-ARPES), we observe directly the associated band splitting near the Fermi energy. The SX-ARPES data obtained from epitaxial thin films of the anticipated antiferromagnetic material CrSb enable a comprehensive comparison with band structure calculations. Our analysis reveals a robust agreement between the experimental results and the theoretical predictions, thereby providing strong evidence for the characterization of CrSb as an altermagnet [Rei23].

The observed maximum altermagnetic band splitting of approximately 0.6 eV in proximity to the Fermi energy underscores the promising potential of altermagnets in advancing applications within the realm of spintronics.

[Rei23] S. Reimers et al., arXiv:2310.17280v1 (2023).

Keywords: Altermagnetism; CrSb; SX-ARPES