Wu Zhongyan, Fedotenko Timofey, Giordano Nico, Kim Jaeyong
Department of Physics, Institute for High Pressure, Hanyang University, Seoul, 04763, Korea.
Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany.
Sci Rep. 2025 Apr 4;15(1):11604. doi: 10.1038/s41598-025-96469-7.
We report enhanced superconductivity in the selenium on the verge of the β-Po-bcc phase transition, achieving up to 9.4 K at 140 GPa. The onset of superconductivity is confirmed by a direct zero-resistance drop R(T), and its nature was further validated by its suppression under an external magnetic field, [Formula: see text] at 140 GPa. An anomalously high R(T) peak preceding the zero resistance state suggests granular superconductivity. Our studies indicate that selenium does not react with hydrogen at 182 GPa at room temperature nor 102 GPa with laser heating to 3000 K, implying that the synthesis of selenium hydride requires higher energy conditions than the ones predicted theoretically. Our findings offer insights into the mechanism of phase-transition-related enhanced superconductivity and motivate further study into the search for high [Formula: see text] superconductors in elements at extremely high pressure.
我们报道了处于β-Po体心立方相转变临界状态的硒中增强的超导性，在140吉帕斯卡压力下超导转变温度高达9.4开尔文。超导性的起始通过直接的零电阻下降R(T)得以证实，其特性通过在140吉帕斯卡压力下外部磁场中的抑制作用[公式：见正文]进一步得到验证。在零电阻状态之前出现的异常高的R(T)峰值表明存在颗粒超导性。我们的研究表明，在室温下182吉帕斯卡压力时硒不与氢反应，在激光加热到3000开尔文时102吉帕斯卡压力下也不反应，这意味着氢化硒的合成需要比理论预测更高的能量条件。我们的发现为与相变相关的增强超导性机制提供了见解，并推动了在极高压力下对元素中高[公式：见正文]超导体的进一步研究。
