Pushing the boundaries of the thermal conductivity of materials

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Digression: ion bombardment of a superlattice (with Y. Cao and D. Jena) • 2.3 MeV Ar ion irradiation of GaN and (AlN) 4 nm -(GaN) 5 nm • Lines are Debye- Callaway models assuming phonon Rayleigh scattering scales linearly with ion dose. • Fit gives Γ = 1 at an ion dose of 10 14 cm -2 Λ (W m -1 K -1 ) 100 30 10 2 10 12 GaN SL 10 13 10 14 Dose (cm -2 )
Molecular dynamics simulation • MD work by Bodapati and Keblinski (RPI) • Original LJ model of WSe 2 gives 0.06 W/m- K independent of length-scale • Conclusion: physics is general, not specific to some detail of the WSe 2 bonding or microstructure
Page 1 and 2: Pushing the boundaries of the therm
Page 3 and 4: Interfaces are critical at the nano
Page 5 and 6: Thermal conductivity and interface
Page 7 and 8: Brief introduction to thermoelectri
Page 9 and 10: Carbon nanotubes • Evidence for t
Page 11 and 12: Critical aspect ratio of a fiber co
Page 13 and 14: psec acoustics and time-domain ther
Page 15 and 16: Windows software author: Catalin Ch
Page 17 and 18: Thermal conductivity map of a human
Page 19 and 20: Critical aspect ratio of a fiber co
Page 21 and 22: Can we beat the amorphous limit of
Page 23 and 24: Works well for homogeneous disorder
Page 25 and 26: W/Al 2 O 3 nanolaminates • ultra-
Page 27 and 28: Cross-sectional TEM of 60 nm thick
Page 29: Ion irradiation of WSe 2 MD simulat
Page 33 and 34: Back to experiment: Can we lower th
Page 35: Conclusions • Difficult to take a

Pushing the boundaries of the thermal conductivity of materials

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