Nonlinear transport reveals a previously undetected lower-symmetry phase and altermagnetism in Ca3Ru2O7 below 48 K via longitudinal NLR and nonlinear Hall effect linked to a ~0.1 pm lattice distortion.
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Probing Hidden Symmetry and Altermagnetism with Sub-Picometer Sensitivity via Nonlinear Transport
Nonlinear transport reveals a previously undetected lower-symmetry phase and altermagnetism in Ca3Ru2O7 below 48 K via longitudinal NLR and nonlinear Hall effect linked to a ~0.1 pm lattice distortion.