arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2406.12964cond-mat.str-elcond-mat.supr-con
收藏

通过赝能隙金属的禁闭转变得到的d波超导体中的涡旋结构

Vortex structure in a $d$-wave superconductor obtained by a confinement transition from the pseudogap metal

Jia-Xin Zhang, Subir Sachdev

AI总结:

本研究计算了从赝能隙金属经禁闭转变形成的d波超导体的涡旋结构,发现涡旋中心存在周期2电荷序,局域态密度无零偏峰但有反相调制的亚能隙峰,与铜氧化物实验观测相符。

摘要:

我们计算了从高温赝能隙金属中涌现的d波超导体中通量为h/(2e)的涡旋结构。这类转变由一种连续理论描述:2种电荷为e的玻色子发生希格斯凝聚,这些玻色子是涌现的SU(2)规范场的基本自由度。涡旋中心附近存在周期为2的电荷序。将电子与超导序参量和电荷序参量耦合后,我们发现电子局域态密度不存在零偏置峰,这与BCS理论相反。但在正、负偏压处存在亚能隙峰,且这些峰呈现反相的周期性空间调制,与欠掺杂铜氧化物扫描隧道显微镜实验中的观测结果(K. Matsuba等人,J. Phys. Soc. Jpn. 76, 063704 (2007))相似。

英文摘要:

We compute the structure of flux $h/(2e)$ vortices in a d-wave superconductor which emerges from a higher temperature pseudogap metal. Such a transition is described by a continuum theory of the Higgs condensation of 2 flavors of charge $e$ bosons which are fundamentals of an emergent SU(2) gauge field. Period-2 charge order is present near the vortex center. Upon coupling the electrons to the superconducting and charge order parameters, we find that the electronic local density of states does not have a zero-bias peak, in contrast to BCS theory. But there are sub-gap peaks at positive and negative bias, and these exhibit anti-phase periodic spatial modulations, similar to observations in scanning tunneling microscopy experiments in the underdoped cuprates (K. Matsuba et al., J. Phys. Soc. Jpn. 76, 063704 (2007)).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑