Revisiting the symmetry and optical phonons of altermagnetic $\hat{I}\pm$-MnTe

Ece Uykur, Marcos V. Gonçalves-Faria, Sahana Rößler +5

Using infrared (IR) and Raman spectroscopies combined with high-resolution x-ray diffraction, we address several controversial aspects of altermagnetic $\hat{I}\pm$-MnTe. We show that mech…