This study presents a theoretical approach to distinguish between apparent and hidden altermagnetism in CsV2Te2O materials using uniaxial strain. The research reveals that C-type antiferromagnetic ordering exhibits a linear piezomagnetic response, while G-type maintains zero net magnetization due to PT symmetry. The findings provide a clear experimental signature for identifying magnetic ground states in these materials.
Key findings
Uniaxial strain differentiates apparent and hidden altermagnetism in CsV2Te2O family.
C-type AFM shows linear piezomagnetic response with net magnetic moment varying from -0.2 to +0.2µ B.
G-type AFM maintains zero net magnetization at all strain values due to PT symmetry.
Strain-induced magnetization in C-type ordering correlates with layer-resolved staggered magnetization.
Limitations & open questions
Further experimental validation is needed to confirm theoretical predictions.