论文标题
FESE和缺失的电子口袋问题
FeSe and the missing electron pocket problem
论文作者
论文摘要
电子词的性质和起源在我们对基于铁的超导体的理解中仍然是一个重大挑战。这在果皮葡萄染色剂FESE中尤其明显，目前尚不清楚M点附近实验确定的费米表面如何从在四方状态的两个电子口袋中演变而来，而不是在列明状态下仅表现出一个单个电子口袋。这提出了一个重大的理论挑战，该挑战已被称为FESE缺失的电子口袋问题，如果我们希望在更广泛的基于铁的超导体中揭示nematicition和超导性的秘密，则至关重要。在这里，我们回顾了最新的实验工作，从ARPE和STM测量中发现了这种nematic Fermi表面，以及当前的理论尝试解释了这种缺失的FESE电子袋，特别着重于$ d_ {xy} $ orbital concomportion nematiation nemativications nematications nematicativications nematications nematications的新兴重要性。此外，我们将讨论这种缺失的电子口袋对该系统中超导性的理论理解的后果，并提出几个剩余的开放问题和途径，以供未来的研究。
The nature and origin of electronic nematicity remains a significant challenge in our understanding of the iron-based superconductors. This is particularly evident in the iron chalcogenide, FeSe, where it is currently unclear how the experimentally determined Fermi surface near the M point evolves from having two electron pockets in the tetragonal state to exhibiting just a single electron pocket in the nematic state. This has posed a major theoretical challenge, which has become known as the missing electron pocket problem of FeSe, and is of central importance if we wish to uncover the secrets behind nematicity and superconductivity in the wider iron-based superconductors. Here, we review the recent experimental work uncovering this nematic Fermi surface of FeSe from both ARPES and STM measurements, as well as current theoretical attempts to explain this missing electron pocket of FeSe, with a particular focus on the emerging importance of incorporating the $d_{xy}$ orbital into theoretical descriptions of the nematic state. Furthermore, we will discuss the consequence this missing electron pocket has on the theoretical understanding of superconductivity in this system and present several remaining open questions and avenues for future research.
