Bulk antiferromagnetic KV2Se2O is predicted to have d-wave altermagnetic surface states and a large surface nonlinear Edelstein effect that explains existing spin-splitting observations.
Multipiezo effect in altermagnetic V2SeTeO monolayer
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abstract
Inspired by recent theoretical proposal on the interesting piezomagnetism and C-paired valley polarization in V2Se2O monolayer, we predict a stable antiferromagnetic Janus monolayer V2SeTeO with altermagnetic configuration using density functional theory calculations. It exhibits a novel multi-piezo effect combining piezoelectric, piezovalley and piezomagnetism. Most interestingly, the valley polarization and the net magnetization under strain in V2SeTeO exceed these in V2Se2O, along with the additional large piezoelectric coefficient of e31 (0.322*10-10 C m-1). The multi-piezo effect makes antiferromagnetic Janus monolayer V2SeTeO a tantalizing material for potential applications in nanoelectronics, optoelectronics, spintronics and valleytronics.
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Emergence and Detection of Surface altermagnetism in KV$_2$Se$_2$O
Bulk antiferromagnetic KV2Se2O is predicted to have d-wave altermagnetic surface states and a large surface nonlinear Edelstein effect that explains existing spin-splitting observations.