Title: Pressure Induced Anomalous Metal in the Vicinity of the Superconductor Insulator Transition Show Chinese title

Title: 压力诱导的超导-绝缘体转变附近的反常金属态

Abstract: The Superconductor-to-Insulator Transition (SIT) in two-dimensional superconductors occurs due to a competition between superconductivity, quantum interferences, Coulomb interactions and disorder. Despite extensive theoretical and experimental investigation, the SIT remains an active research area due to the potential for exotic phases near the transition. One such phase is the Anomalous Metal, which has been claimed to exist between the insulating and superconducting states. This elusive phase, which is not consistent with current theories, is under heavy deliberations nowadays. We present an experimental study of the effect of high pressure on thin films of amorphous indium oxide. Our results show that pressure induces a series of transitions from a Bose insulator through a superconducting phase, metallic phases and finally to a conventional insulator. We suggest that our findings reaffirm the existence of a two-dimensional metal close to the SIT and show that its occurrence requires relatively strong coupling between regions that are weakly superconducting. Show Chinese abstract

Abstract: 二维超导体中的超导 - 绝缘体转变（SIT）是由于超导性、量子干涉、库仑相互作用和无序之间的竞争引起的。 尽管进行了广泛而深入的理论和实验研究，但由于过渡附近可能存在奇异相，SIT仍然是一个活跃的研究领域。 其中一个这样的相态是反常金属，据称存在于绝缘态和超导态之间。 这种与现有理论不符的难以捉摸的相态如今正受到密切关注。 我们展示了高压对非晶氧化铟薄膜影响的实验研究结果。 我们的研究表明，压力诱导了一系列从玻色绝缘体经超导态、金属态最终转变为常规绝缘体的转变。 我们认为我们的发现证实了接近SIT的二维金属的存在，并表明其出现需要弱超导区域之间相对较强的耦合。