Imaging the Néel vector switching in the monolayer antiferromagnet MnPSe3 with strain-controlled Ising order.Antiferromagnets are interesting materials for spintronics because of their faster dynamics and robustness against perturbations from magnetic fields.  Here, using spatially resolved second-harmonic generation, we show direct evidence of long-range antiferromagnetic order and Ising-type Néel vector switching in monolayer MnPSe3 with large XY anisotropy.  A change of the universality class of the phase transition in the XY model under uniaxial strain causes this emergence of strain-controlled Ising order in the XY magnet MnPSe3. 
MnPSe3
Here, using spatially resolved second-harmonic generation, we show direct evidence of long-range antiferromagnetic order and Ising-type Néel vector switching in monolayer MnPSe3 with large XY anisotropy. 
second-harmonic generation