Journal
PHYSICAL REVIEW LETTERS
Volume 119, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.077702
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Funding
- National Science Foundation through the Massachusetts Institute of Technology Materials Research Science and Engineering Center [DMR-1419807]
- National Science Foundation [1639921]
- Nanoelectronics Research Corporation (NERC)
- NSF [DMR-1539916]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1639921] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1539916] Funding Source: National Science Foundation
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The strongly spin-momentum coupled electronic states in topological insulators (TI) have been extensively pursued to realize efficient magnetic switching. However, previous studies show a large discrepancy of the charge-spin conversion efficiency. Moreover, current-induced magnetic switching with TI can only be observed at cryogenic temperatures. We report spin-orbit torque switching in a TI-ferrimagnet heterostructure with perpendicular magnetic anisotropy at room temperature. The obtained effective spin Hall angle of TI is substantially larger than the previously studied heavy metals. Our results demonstrate robust charge-spin conversion in TI and provide a direct avenue towards applicable TI-based spintronic devices.
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