arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2408.03352cond-mat.supr-con
收藏

RbV3Sb5中带有残余费米弧的手性对密度波

Chiral pair density waves with residual Fermi arcs in RbV3Sb5

Xiao-Yu Yan, Hanbin Deng, Tianyu Yang, Guowei Liu, Wei Song, Hu Miao, Hechang Lei, Shuo Wang, Ben-Chuan Lin, Hailang Qin, Jia-Xin Yin

AI总结:

针对RbV3Sb5中手性电荷序与超导电性相互作用不明的问题,研究利用极低温STM观测到手性2×2对密度波及残余费米弧,探讨了二者的空间-动量对应关系。

摘要:

笼目超导体RbV3Sb5中已报道并证实存在手性2×2电荷序,但由于其在AV3Sb5家族(A=K、Rb、Cs)中超导转变温度Tc最低,约为0.85K,给电子谱学探测带来极大挑战,因此该电荷序与超导电性的相互作用仍不明确。本文利用基于稀释制冷机、可降温至30mK的扫描隧道显微镜(STM),在RbV3Sb5中观测到带有残余费米弧的手性2×2对密度波。研究发现150μeV的超导能隙存在大量残余隙内态,该能隙的空间分布呈现手性2×2调制,表明存在手性对密度波(PDW)。对零能残余态的准粒子干涉成像进一步揭示出弧状图案。本文还基于PDW与Bogoliubov费米态之间的空间-动量对应关系,讨论了能隙调制与残余费米弧的关联。

英文摘要:

The chiral 2 by 2 charge order has been reported and confirmed in the kagome superconductor RbV3Sb5, while its interplay with superconductivity remains elusive owing to its lowest superconducting transition temperature Tc of about 0.85K among the AV3Sb5 family (A=K, Rb, Cs) that severely challenges electronic spectroscopic probes. Here, utilizing dilution-refrigerator-based scanning tunneling microscopy (STM) down to 30mK, we observe chiral 2 by 2 pair density waves with residual Fermi arcs in RbV3Sb5. We find a superconducting gap of 150μeV with substantial residual in-gap states. The spatial distribution of this gap exhibits chiral 2 by 2 modulations, signaling a chiral pair density wave (PDW). Our quasi-particle interference imaging of the zero-energy residual states further reveals arc-like patterns. We discuss the relation of the gap modulations with the residual Fermi arcs under the space-momentum correspondence between PDW and Bogoliubov Fermi states.

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。

↑