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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Determining the underlying Fermi surface of strongly correlated superconductors
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Determining the underlying Fermi surface of strongly correlated superconductors

机译:确定强相关超导体的基本费米表面

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摘要

The notion of a Fermi surface (FS) is one of the most ingenious concepts developed by solid-state physicists during the past century. It plays a central role in our understanding of interacting electron systems. Extraordinary efforts have been undertaken, by both experiment and theory, to reveal the FS of the high-temperature superconductors, the most prominent class of strongly correlated superconductors. Here, we discuss some of the prevalent methods used to determine the FS and show that they generally lead to erroneous results close to half-filling and at low temperatures, because of the large superconducting gap (pseudogap) below (above) the superconducting transition temperature. Our findings provide a perspective on the interplay between strong correlations and superconductivity and highlight the importance of strong coupling theories for the characterization and determination of the underlying FS in angle-resolved photoemission spec-troscopy experiments.
机译:费米表面(FS)的概念是固态物理学家在过去一个世纪中提出的最巧妙的概念之一。它在我们对相互作用的电子系统的理解中起着核心作用。通过实验和理论都做出了非凡的努力,以揭示高温超导体的FS,高温超导体是最强相关的超导体类别。在这里,我们讨论了一些用于确定FS的流行方法,并表明它们通常会导致接近半填充和低温的错误结果,这是由于低于(高于)超导转变温度的大超导间隙(pseudogap) 。我们的发现为强相关性和超导性之间的相互作用提供了一个视角,并强调了强耦合理论对于角度分辨光发射光谱实验中表征和确定基础FS的重要性。

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