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4시 20분부터 제1과학관 31214 e+강의실에서 간단한 다과를 제공합니다.

아 래

Title: Connecting Thermoelectricity and Superconductivity by Pressure Bridge

Speaker: Dr. Xiao-Jia Chen (HPSTAR, Center for High Pressure Science &Technology Advanced Research)

Date & Time: Mar. 20. (Wed.) 2019 4:30 PM

Place: Natural Science 1,  Room No. 31214

Abstract: Both thermoelectricity and superconductivity are two important phenomena for energy efficiency applications. Thermoelectric materials can directly generate electric power by converting waste heat, and the efficiency is appraised by the figure of merit. A high figure of merit larger than 3 is required to achieve comparable efficiency of the traditional heat engines. Here, we choose several semiconductors or semimetals as examples to show the extremely important role of pressure on both phenomena. The general enhancement of the figure of merit is realized in these materials by the application of pressure based on the newly developed high-pressure techniques. Meanwhile, superconductivity is induced in these materials upon further compression. The natural bridge connecting superconductivity and thermoelectricity is thus built. These findings not only demonstrate the remarkable role of pressure played in improving the performance of thermoelectric materials but also offer a new route for finding superconductors from highly efficient thermoelectric materials.