Optical reflectance, ellipsometry, and Raman data plus DFT indicate bulk RuO2 is best described as nonmagnetic, with altermagnetic order only potentially stabilized by specific epitaxial strain.
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Effects of altermagnetic order, strain and doping in RuO$_2$
Optical reflectance, ellipsometry, and Raman data plus DFT indicate bulk RuO2 is best described as nonmagnetic, with altermagnetic order only potentially stabilized by specific epitaxial strain.