论文标题
隐藏的伪和激发光谱在强烈耦合的两波段超级流体/超导体中
Hidden Pseudogap and Excitation Spectra in a Strongly Coupled Two-Band Superfluid/Superconductor
论文作者
论文摘要
我们研究了整个Bardeen-Cooper-Schrieffer（BCS）的两个波段超导体或超氟的单粒子激发特性，以在多体T-Matrix近似值中，在多机t-matrix近似中，用于多个频道配对波动。我们解决了状态的单粒子密度和光谱函数，这些函数由与宽松的深层带和强烈相互作用的浅带相关的两个贡献，与基于铁的基于铁的多播超导体和多组分的费米子超级流体相关。我们展示了浅带中的伪造状态如何被整个两个波段BCS-BEC跨界的深带贡献所隐藏。我们的结果可以解释在最近扫描fese超导体中扫描隧道显微镜实验中缺失的假单。
We investigate single-particle excitation properties in the normal state of a two-band superconductor or superfluid throughout the Bardeen-Cooper-Schrieffer (BCS) to Bose-Einstein-condensation (BEC) crossover, within the many-body T-matrix approximation for multi-channel pairing fluctuations. We address the single-particle density of states and the spectral functions consisting of two contributions associated with a waekly interacting deep band and a strongly interacting shallow band, relevant for iron-based multiband superconductors and multicomponent fermionic superfluids. We show how the pseudogap state in the shallow band is hidden by the deep band contribution throughout the two-band BCS-BEC crossover. Our results could explain the missing pseudogap in recent scanning tunneling microscopy experiments in FeSe superconductors.
