Abstract
In altermagnets [1], the spin polarization in both real space and electronic structure alternates. Consequently, altermagnetism enables effects that were believed to be limited to ferromagnets. However, many of the predicted altermagnetic phenomena [2] await their experimental confirmation. Here, we present a magneto-transport characterization of the semiconducting, compensated collinear altermagnet MnTe (Fig.1-a) [3]. We experimentally confirm the symmetry components of the longitudinal (Fig.1-b) and transversal anisotropic magnetoresistance in thin films of MnTe. Furthermore, we discuss which contributions to the measured transversal and longitudinal signals can be signatures of the unconventional altermagnetic phase.
[1] L. Šmejkal et al., Phys. Rev. X., 12.031042 (2022)
[2] L. Šmejkal et al., Phys. Rev. X., 12.011028 (2022)
[3] R. D. Gonzalez Betancourt et al., Phys. Rev. Lett. 130, 036702 (2023)