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RESEARCH PRODUCT
Efficient Electrical Spin Splitter Based on Nonrelativistic Collinear Antiferromagnetism
Yuta YahagiLibor ŠMejkalLibor ŠMejkalLibor ŠMejkalTomas JungwirthTomas JungwirthJ. ŽEleznýKarel VýbornýRafael González-hernándezRafael González-hernándezJairo SinovaJairo Sinovasubject
PhysicsCondensed Matter - Materials ScienceSpinsField (physics)Condensed matter physicsSpintronicsMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesGeneral Physics and Astronomy01 natural sciences7. Clean energy3. Good healthAb initio quantum chemistry methodsSplitter0103 physical sciencesMoment (physics)AntiferromagnetismCondensed Matter::Strongly Correlated Electrons010306 general physicsSpin-½description
Electrical spin-current generation is among the core phenomena driving the field of spintronics. Using {\em ab initio} calculations we show that a room-temperature metallic collinear antiferromagnet RuO$_2$ allows for highly efficient spin-current generation, arising from anisotropically-split bands with conserved up and down spins along the N\'eel vector axis. The zero net moment antiferromagnet acts as an electrical spin-splitter with a 34$^\circ$ propagation angle between spin-up and spin-down currents. Correspondingly, the spin-conductivity is a factor of three larger than the record value from a survey of 20,000 non-magnetic spin-Hall materials. We propose a versatile spin-splitter-torque concept utilizing antiferromagnetic RuO$_2$ films interfaced with a ferromagnet.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-02-17 | Physical Review Letters |