Spontaneous Antiferromagnetic Ordering in a Single Layer of (BETS)2GaCl4 Organic Superconductor
Spontaneous Antiferromagnetic Ordering in a Single Layer of (BETS)2GaCl4 Organic Superconductor
复制标题
DOI：
10.1002/aelm.202000461
复制
发表时间：
2020-09
影响因子：
6.2
通讯作者：
A. Hassanien;Biao Zhou;A. Kobayashi
中科院分区：
文献类型：
--
作者：
A. Hassanien;Biao Zhou;A. Kobayashi
利用扫描隧道显微镜和光谱研究了Ag（111）上单层有机d波超导体（BETS）2GaCl 4中超导性和磁性之间的相互作用。由于（BETS）_2GaCl_4超导单层中缺乏二聚体，自发地形成了GaCl_4的反铁磁分子链。低于7 K的转变温度，超导秩序掩盖了反铁磁秩序和主导的电子性质，显示出一个普遍存在的差距，在整个岛与邻近效应的岛/Ag（111）界面。随着温度的升高，这些特征逐渐衰减，让位于GaCl 4链上的近藤浸渍，在（BETS）2GaCl 4条纹上具有额外的非弹性振动特征。这些信号在低于Tc时的同时缺失可能与重整化过程有关，在重整化过程中，声子和反铁磁涨落都表现出合作存在，以介导这种d波超导体中的超导性。
Scanning tunneling microscopy and spectroscopy are presented to study the interplay between superconductivity and magnetism in a single‐layer organic d‐wave superconductor (BETS)2GaCl4 on Ag(111). Antiferromagnetic molecular chains of GaCl4 are spontaneously formed within (BETS)2GaCl4 superconducting single layer due to shortages of BETS dimers. Below transition temperature of 7 K, the superconducting order masks the antiferromagnetic order and dominates the electronic properties, showing a ubiquitous gap over the entire island with proximity effect across the island/Ag(111) interface. These features gradually decay with the rise in temperature giving way to a Kondo dip on GaCl4 chains, with additional inelastic vibronic features on (BETS)2GaCl4 stripes. The concurrent absence of these signals below Tc may be related to a renormalization process where both phonon and antiferromagnetic fluctuation exhibit a cooperative existence to mediate superconductivity in such d‐wave superconductors.