The perfect thermal conductor and the perfect thermal insulator

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Super<strong>conductor</strong>s are an effective heat switch• Strong magnetic fieldsquenchessuperconductivity.• Normal electrons carryheat but Cooper pairsdo not.Schubert, RSI 55, 1486 (1984)
But unconventional metals show avariety of behaviorYBCO B-field dependenceMgB 2Schneider et al.,Physica C 363, 6 (2001)Peacor, Cohn, Uher, PRB 43, 8721 (1991)
Page 1 and 2: Thermal unobtainiums?The perfect th
Page 3 and 4: Outline—toward perfect thermal in
Page 5 and 6: Peak occurs at T ∼ Θ Debye /30 i
Page 7 and 8: Isotopes contribute to thermal resi
Page 9 and 10: High Debye temperature also produce
Page 11: Ambipolar diffusion contributes to
Page 15 and 16: Could a solid-state Bose condensate
Page 17 and 18: Nanoscale boundary scattering reduc
Page 19 and 20: Disorder creates localization in 1D
Page 21 and 22: Works well for homogeneousdisordere
Page 23 and 24: Layered disordered crystals: WSe 2
Page 25 and 26: Thermal conductivity of WSe 2• 60
Page 27 and 28: Back to experiment: Can we lower th
Page 29 and 30: Research directions• Passive and

The perfect thermal conductor and the perfect thermal insulator

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