Table 2 Coupling constants and Curie temperatures for CrS2 nanotubes and monolayer CrS2
From: Ferromagnetic semiconductor nanotubes with room Curie temperatures
Perimeter (CrS2 units) | Coupling constants (meV) | TC (K) estimated by | \(\frac{{T}_{{\rm{C}}}({J}_{1},{J}_{2},{J}_{3})}{{T}_{{\rm{C}}}({J}_{1})}\) | |||
|---|---|---|---|---|---|---|
J1S2 | J2S2 | J3S2 | J1 | J1,J2,J3 | ||
12 | − 16.96 | − 6.75 | 4.92 | 208 | 230 | 111% |
14 | − 11.50 | − 8.28 | 6.61 | 141 | 158 | 112% |
16 | − 16.89 | − 7.78 | 6.38 | 207 | 222 | 107% |
18 | − 19.38 | − 14.30 | 10.08 | 238 | 309 | 130% |
20 | − 14.08 | − 11.26 | 9.57 | 173 | 246 | 142% |
22 | − 15.38 | − 10.95 | 8.48 | 189 | 222 | 117% |
24 | − 15.33 | − 5.45 | 6.04 | 188 | 151 | 80% |
∞ (monolayer) | − 10.78 | − 4.53 | − 3.20 | 132 | 295 | 224% |
