高温铜氧化物超导体能隙问题研究最新进展

高温铜氧化物超导体的超导机制是最近20多年凝聚态物理中的重大难题之一，而蕴含其中的高温超导体的能隙问题，特别是赝能隙的起源及其与超导能隙之间的关系，一直是凝聚态物理实验和理论研究的重要内容。我们从实验和理论两方面，概括综述了近年来针对高温铜氧化物超导体能隙问题研究的最新进展，对几种能够直接探测赝能隙和超导能隙特性的实验方法，如角分辨光电子能谱、扫描隧穿谱和电子拉曼光谱等主要实验结果进行了系统的梳理，同时介绍了与这些实验结果紧密联系的几种较为流行的理论模型及其结果。最后针对这些问题给出了简单的讨论，并展望了下一步的发展，期望对高温超导体物理性质的进一步理解和研究具有积极的帮助作用。

Recent advances on energy gaps in high temperature cuprate oxide superconductors

The superconducting （SC） mechanism of high temperature cuprate oxide superconductors is one of the key issues in condensed matter physics during the past two decades. The energy gaps in these compounds, in particular, the origin of pseudogaps as well as its relation to the SC gap that may be intimately related to the SC mechanism, have been the focus of both experimental and theoretical studies in recent years. In this paper, we shall start from both experimen- tal and theoretical aspects to review the recent advances on energy gaps in high temperature cuprate oxide superconductors. The emphasis of the experimental results has been laid on the ARPES, STM, Raman spectra, etc. Meanwhile, several influential theoretical models that are closely associated with experiments are briefly discussed. Some remarks on these results and consequences are made, and a possible prospective is also presented. This brief review is ex- pected to help better understand the SC mechanism of these cuprates.