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Title

Low-temperature thermal rectification by tailoring isotope distributions

AuthorsRoyo Valls, Miquel; Torres, Pol; López Suárez, Miquel; Rurali, Riccardo CSIC ORCID
Issue Date9-Jan-2019
AbstractWe combine first-principles electronic structure calculated thermal conductivity data with a numerical solution of the one-dimensional heat equation to show that an asymmetric distribution of impurity scattering, if suitably designed, yields the conditions for a low-temperature thermal rectification. This happens as a result of the differences in the peaks of the temperature dependence of the thermal conductivity. We demonstrate the effectiveness of the method by probing the thermal rectification rendered by a silicon slab with a steplike position-dependent isotopic composition. The same conclusions are obtained by using experimentally measured values of the thermal conductivity of Si samples with different isotope distributions.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.99.024103
URIhttp://hdl.handle.net/10261/203162
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