Active Peltier Coolers Based on Correlated and Magnon-Drag Metals
Active Peltier Coolers Based on Correlated and Magnon-Drag Metals
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DOI：
10.1103/physrevapplied.11.054008
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发表时间：
2019-05-03
影响因子：
4.6
通讯作者：
Heremans, J. P.
中科院分区：
文献类型：
--
作者：
Adams, M. J.;Verosky, M.;Heremans, J. P.
主动冷却系统利用电力将热设备（如集成电路）的热区域的热量排出到被动散热器，从而使热设备（如集成电路）降至接近环境温度。商用热电模块针对制冷进行了优化，对于主动冷却并不理想。制冷通过将设备的冷区热量泵送到散热器来保持设备（如厨房冰箱）内低于环境温度的温度。传统上，热电性能指标zT被用来评价热电模块的性能，包括制冷模块。但它并不是主动冷却材料性能的良好指标。在这里，我们描述了一种高效的、基于珀尔帖效应的全固态主动冷却器，该冷却器在金属中具有高热电功率因数（由于电子相关效应（CePd3）或磁振子阻力（Co））和高被动导热系数。理论和实验表明，在外加电流作用下的有效热导率可以超过傅立叶热传导定律的极限。所设计的装置测量的有效热导比δ T = 1 K时的被动热导大一个数量级，动态响应为4 s。
Active cooling systems use electrical work to bring a hot device (such as an integrated circuit) down to near ambient temperature by draining heat from the hot area of the device to a passive heat sink. Commercial thermoelectric modules are optimized for refrigeration, and are not ideal for active cooling. Refrigeration maintains a temperature that is below the ambient temperature in a device (such as a kitchen refrigerator) by pumping heat from the cold area of the device to a heat sink. The thermoelectric figure of merit zT is used traditionally to evaluate the performance of thermoelectric modules, including refrigeration modules. But it is not a good indicator of the performance of active cooling materials. Here, we describe an efficient, all-solid-state active cooler based on the Peltier effect in metals with high thermoelectric power factor due to electron correlation effects (CePd3) or magnon drag (Co) and high passive thermal conductivity. We show theoretically and experimentally that the effective thermal conductance under applied current can exceed the limits imposed by Fourier's heat conduction law. The designed device measures an effective thermal conductance that is an order of magnitude larger than the passive thermal conductance at Delta T = 1 K with the dynamic response of 4 s.