The typical hallmarks of superconductivity are a sharp drop in resistance below the superconducting transition temperature and the Meissner effect — the expulsion of magnetic fields from the interior of the superconductor. In hydrogen-rich materials at megabar conditions, theory predicts that strong electron–phonon coupling and high characteristic phonon frequencies could stabilize superconducting condensates up to around 300 K.

Following this blueprint, many experiments over the past decade have identified a number of promising hydride superconductors operating at relatively high temperatures. Yet, evidence of the Meissner effect has been elusive because of the sensitivity limitations of magnetic sensors at extreme pressures. Owing to similar limitations that resistivity measurements also suffer at such extreme pressure conditions, a convincing proof of the Meissner effect would significantly strengthen the claims of superconductivity in hydrides.

超导的典型特征是低于超导转变温度时电阻急剧下降以及迈斯纳效应（超导体内部磁场的排出）。在兆巴条件下的富氢材料中，理论预测强电子声子耦合和高特征声子频率可以将超导凝聚体稳定在高达 300 K 左右。

按照这个蓝图，过去十年的许多实验已经确定了许多在相对较高温度下工作的有前途的氢化物超导体。然而，由于磁传感器在极端压力下的灵敏度限制，迈斯纳效应的证据一直难以捉摸。由于电阻率测量在如此极端的压力条件下也受到类似的限制，迈斯纳效应的令人信服的证据将大大加强氢化物超导性的主张。