Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Physical significance: λ(ξ, ξ), λ(q,q), λ(0), a(ξ, ξ)_
| Coefficient | Description | Measurement unit |
|---|---|---|
| λ (ξ, ξ ), λ (q,q), λ (0) | Thermal conductivity | W =(meters Kelvin) |
| a(ξ, ξ ) | Thermal conductivity rate | W =(meters Kelvin seconds) |
Parameter estimation values for some metals_
| Metal | α′ (10−4 × m2/s) | t1 (picoseconds) | t2 (picoseconds) |
|---|---|---|---|
| Ag | 1.6620 | 0.7438 | 89.286 |
| Cu | 1.1283 | 0.4348 | 70.883 |
| Au | 1.2495 | 0.7438 | 89.286 |
| Pb | 0.2301 | 0.1670 | 12.097 |