Details

Autor(en) / Beteiligte

• González-Hernández, Rafael
• Šmejkal, Libor
• Výborný, Karel
• Yahagi, Yuta
• Sinova, Jairo
• Jungwirth, Tomáš
• Železný, Jakub

Titel

Efficient Electrical Spin Splitter Based on Nonrelativistic Collinear Antiferromagnetism

Ist Teil von

• Physical review letters, 2021-03, Vol.126 (12), p.127701-127701, Article 127701

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2021

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Spin-current generation by electrical means is among the core phenomena driving the field of spintronics. Using ab initio calculations we show that a room-temperature metallic collinear antiferromagnet RuO_{2} allows for highly efficient spin-current generation, arising from anisotropically spin-split bands with conserved up and down spins along the Néel vector axis. The zero net moment antiferromagnet acts as an electrical spin splitter with a 34° propagation angle between spin-up and spin-down currents. The corresponding spin conductivity is a factor of 3 larger than the record value from a survey of 20 000 nonmagnetic spin-Hall materials. We propose a versatile spin-splitter-torque concept circumventing limitations of spin-transfer and spin-orbit torques in present magnetic memory devices.