Pushing the boundaries of the thermal conductivity of materials
Pushing the boundaries of the thermal conductivity of materials
Pushing the boundaries of the thermal conductivity of materials
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Digression: ion bombardment <strong>of</strong> a<br />
superlattice (with Y. Cao and D. Jena)<br />
• 2.3 MeV Ar ion<br />
irradiation <strong>of</strong> GaN and<br />
(AlN) 4 nm -(GaN) 5 nm<br />
• Lines are Debye-<br />
Callaway models<br />
assuming phonon<br />
Rayleigh scattering<br />
scales linearly with ion<br />
dose.<br />
• Fit gives Γ = 1 at an ion<br />
dose <strong>of</strong> 10 14 cm -2<br />
Λ (W m -1 K -1 )<br />
100<br />
30<br />
10<br />
2<br />
10 12<br />
GaN<br />
SL<br />
10 13<br />
10 14<br />
Dose (cm -2 )
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