Införskaffa fundamentalt förståelse för snabb antiferromagnetisk spinntronik

Tidsperiod: 2020-01-01 till 2022-12-31

Projektledare: Ritwik Mondal

Finansiär: Vetenskapsrådet

Bidragstyp: Bidrag för anställning eller stipendier

Budget: 3 150 000 SEK

Antiferromagnetic spintronics holds promise for future spin-based data storage devices because of the intrinsic ultrafast dynamics in antiferromagnets, their abundance in nature, robustness against perturbation, and large magneto-transport effects. The present proposal aims at achieving deep understanding of spin manipulation in antiferromagnetic spintronics starting from analytical relativistic theory and using computer simulations, based on first-principles calculations and atomistic spin dynamics. I shall develop a complete and robust description of theoretical and computational relativistic spin dynamics combining Dirac theory and atomistic spin dynamics for new antiferromagnets. Relativistic “staggered” spin torques can provide the key to manipulate spin dynamics in antiferromagnets at ultrashort timescales, but so far not much is known about them. Starting from a relativistic Dirac framework, I shall derive several new types of nonrelativistic and relativistic spin torques and evaluate their contributions numerically. Understanding these torques for antiferromagnetic systems theoretically with analytical and computational tools and experimentally at the host group in Prague is expected to lead to new ways to manipulate the spin dynamics and achieve switching mechanisms. I shall investigate the ultrafast spin dynamics for several novel types of antiferromagnetic systems, particularly, with broken inversion symmetry.