Heat Under the Microscope: Uncovering the Microscopic Processes that Govern Thermal Transport
Heat Under the Microscope:
Uncovering the Microscopic Processes that Govern
Thermal Transport
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1. Heat under the microscope: Unc…
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2. Our research group
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3. Views of heat conduction
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4. Importance of microscopic view
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5. Microscopic view of heat condu…
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6. Challenges for phonons
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7. Outline
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8. Phonons and radio astronomy (a…
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9. ALMA (30-950 GHz)
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10. The impact of cooling
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11. Noise saturation at low temper…
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12. Estimation of temperature rise
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13. Is Fourier's law the right equ…
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14. Computational Method
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15. Boundary conditions
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16. MC simulation at cryo and RT
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17. Temperature distribution – 3…
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18. Temperature distribution – 2…
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19. Temperature distribution – 1…
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20. Temperature distribution – 5…
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21. Temperature distribution – 2…
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22. Temperature distribution – 1…
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23. Temperature distribution – 1…
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24. Temperature distribution – 5…
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25. Temperature distribution – 1…
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26. Temperature distribution – 0…
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27. Channel versus ambient tempera…
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28. Is Fourier's law the right equ…
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29. Ballistic conduction channels
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30. Estimation using phonon radiat…
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31. Consequences
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32. Learning about thermal phonons
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33. Views of thermal conductivity
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34. Experimental approach
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35. Phonon diffraction at rough bo…
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36. Phonon Scattering at a Boundar…
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37. Phonon Boundary Scattering Mod…
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38. What is the specularity parame…
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39. Silicon Membrane - Ideal to Me…
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40. Transient Grating Spectroscopy
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41. Conventional Specularity Estim…
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42. Extra Constraints from Quasiba…
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43. Procedure to Extract Speculari…
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44. Constraints Across Temperature…
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45. Extracted Specularity Paramete…
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46. Ziman Underpredicts Specularit…
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47. Thermal Phonons are Specular
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48. Phonons at interfaces
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49. How does heat cross solid inte…
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50. Phonon transmission coefficien…
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51. Time-domain thermoreflectance …
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52. TDTR: Principle
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53. TDTR: Measurement
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54. Classical fitting procedure: A…
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55. Inverse problem
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56. Getting H(T): ab-initio transp…
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57. Solving the BTE for TDTR
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58. Diffuse mismatch prediction
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59. Particle swarm optimization
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60. Quantifying likelihood
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61. Fitted TDTR data
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62. Measured transmission coeffici…
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63. Interfacial spectral heat flux
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64. Effect of interfacial disorder
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65. TDTR phase data
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66. Transmission across oxide laye…
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67. Conclusion: new understanding …
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68. Summary
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69. Acknowledgments
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