Table 1 Spin Hall angle θSH, electrical conductivity σ, spin Hall conductivity σSH, and SOT normalized power consumption Pn of several heavy metals and topological insulators.
SOT materials | |θSH| | σ (Ω−1 m−1) | |σSH|[(ħ/2e) Ω−1 m−1] | Pn |
|---|---|---|---|---|
Ta | 0.15 | 5.3 × 105 | 8.0 × 104 | 1 |
Pt | 0.08 | 4.2 × 106 | 3.4 × 105 | 3.6 × 10–1 |
W | 0.4 | 4.7 × 105 | 1.9 × 105 | 1.6 × 10–1 |
(Bi0.07Sb0.93)2Te3 (MBE) | 2.5 | 1.8 × 104 | 4.5 × 104 | 3.0 × 10–1 |
Bi2Se3 (MBE) | 3.5 | 5.7 × 104 | 2.0 × 105 | 2.1 × 10–2 |
BixSei1-x (sputtered) | 18.6 | 7.8 × 103 | 1.5 × 105 | 2.6 × 10–2 |
Bi0.85Sb0.15 (sputtered) | 10.7 | 1.5 × 105 | 1.6 × 106 | 5.2 × 10–4 |
