Chiral magnons in altermagnetic MnTe are directly observed and their handedness is reversibly switched by magnetic field.
Polarized incident neu- trons with spins along y probe the NMI term, Ry ∝ I ++ y − I −− y (IN20) or Ry ∝ I +0 y − I − 0 y (HYSPEC) (see SM [41] for detail)
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Observation of Switchable Chiral Magnons in an Altermagnet
Chiral magnons in altermagnetic MnTe are directly observed and their handedness is reversibly switched by magnetic field.