PTCDA Molecular Monolayer on Pb Thin Films: An Unusual π -Electron Kondo System and Its Interplay with a Quantum-Confined Superconductor
PTCDA Molecular Monolayer on Pb Thin Films: An Unusual π -Electron Kondo System and Its Interplay with a Quantum-Confined Superconductor
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Pb 薄膜上的 PTCDA 分子单层：一种不寻常的近藤电子系统及其与量子限制超导体的相互作用
DOI：
10.1103/physrevlett.127.186805
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发表时间：
2021
影响因子：
8.6
通讯作者：
Zhou, Haitao
中科院分区：
文献类型：
--
作者：
Lu, Shuangzan;Nam, Hyoungdo;Xiao, Penghao;Liu, Mengke;Guo, Yanping;Bai, Yusong;Cheng, Zhengbo;Deng, Jinghao;Li, Yanxing;Zhou, Haitao
磁性和超导性的混合已经成为相关电子系统的一个有趣的游乐场，承载着各种新的物理现象。通常，局部电子是磁性的中心。在本研究中，我们将PTCDA（3，4，9，10-perylene tetracarboxylic dianhydride）分子单层膜置于Pb-Sn-Pb薄膜上，建立了一个仅由电子能级组成的磁性/超导混合体系。磁矩存在于源自界面电荷转移的未成对分子轨道中。我们报道了这种近藤屏蔽电子杂质晶格在超导体上的独特的隧穿光谱特征，表明形成了一个二维束缚态带。此外，具有可调扭曲角的莫尔超晶格和在Pb-Pb薄膜中的量子限制提供了简单和灵活的实现来调节近藤物理和超导性之间的相互作用，这在混合系统中很少出现。
The hybridization of magnetism and superconductivity has been an intriguing playground for correlated electron systems, hosting various novel physical phenomena. Usually, localizedorelectrons are central to magnetism. In this study, by placing a PTCDA (3,4,9,10-perylene tetracarboxylic dianhydride) molecular monolayer on ultrathin Pb films, we built a hybrid magnetism/superconductivity () system consisting of onlyelectronic levels. The magnetic moments reside in the unpaired molecular orbital originating from interfacial charge transfers. We reported distinctive tunneling spectroscopic features of such a Kondo screenedelectron impurity lattice on a superconductor in the regime of, suggesting the formation of a two-dimensional bound states band. Moreover, moiré superlattices with tunable twist angle and the quantum confinement in the ultrathin Pb films provide easy and flexible implementations to tune the interplay between the Kondo physics and the superconductivity, which are rarely present inhybrid systems.