In Mn5Si3, the M-point exchange instability is much stronger than the zone-center E2g mode that would host altermagnetism, and epitaxial strain further suppresses it.
BecauseQ 2 =L 4 −4C ×, it makes a positive contribution tov Γ
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Landau theory and exchange instabilities in Mn$_5$Si$_3$: A case against altermagnetism
In Mn5Si3, the M-point exchange instability is much stronger than the zone-center E2g mode that would host altermagnetism, and epitaxial strain further suppresses it.