Superconductivity in efficient thermoelectric Cu₃Sb_0.98Al_0.02Se₄

2015/01/13 by Xiao-Miao Zhao, Xiaomiao Zhao, Yonghui Zhou +26
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Advanced Thermoelectric Materials and Devices #High-pressure geophysics and materials #Magnetic and transport properties of perovskites and related materials #cond-mat.mtrl-sci #cond-mat.supr-con

paper · pdf · doi:10.48550/arxiv.1501.03382

6 pages, 4 figures

arxiv created 2015/01/13 · arxiv updated 2015/01/15

Abstract

Both superconductivity and thermoelectricity offer promising prospects for daily energy efficiency applications. The advancements of thermoelectric materials have led to the huge improvement of the thermoelectric figure of merit in the past decade. By applying pressure on a highly efficient thermoelectric material Cu₃Sb_0.98Al_0.02Se₄, we achieve dome-shape superconductivity developing at around 8.5 GPa but having a maximum critical temperature of 3.2 K at pressure of 12.7 GPa. The novel superconductor is realized through the first-order structural transformation from its initial phase to an orthorhombic one. The superconducting phase is determined in the ultimate formation of the Cu-Al-Sb-Se alloy.

Citations

• Conventional superconductivity at 190 K at high pressures

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