NatureSymmetry, microscopy and spectroscopy signatures of altermagnetismTomas JungwirthJairo SinovaRafael M. FernandesQihang LiuHikaru WatanabeShuichi MurakamiSatoru NakatsujiLibor Šmejkal2026-01-21Full textDOI https://doi.org/10.1038/s41586-025-09883-2