针对 kagome 超导体中 2×2 配对密度波的相位敏感证据
超导电性
2026-05-29 v2
摘要
配对密度波 (PDW) 表现为超导序参量�幅和符号的周期性调制。这种配对态被认为对非磁性散射敏感。本文使用扫描隧道显微镜观察了 kagome 超导体中的非磁性 PDW 破坏效应。我们观察到由电荷有序度与超导性耦合引起的 2×2 PDW。随着在 kagome 晶格中掺入稀疏等价性非磁性杂质，整体 PDW 被显著抑制，而电荷有序度和均匀超导性保持稳健。空间关联分析进一步确认 PDW 在掺杂物附近被明显抑制。我们将 PDW 抑制归因于非磁性 PDW 破坏效应，源于 kagome d轨道中驻留博伦利亚费米态的 PDW 相位符号调制。
关键词
引用
@article{arxiv.2510.10958,
title = {Phase-sensitive evidence for 2x2 pair density wave in a kagome superconductor},
author = {Xiao-Yu Yan and Guowei Liu and Hanbin Deng and Xitong Xu and Haiyang Ma and Hailang Qin and Jun-Yi Zhang and Yuanyuan Zhao and Haitian Zhao and Zhe Qu and Yigui Zhong and Kozo Okazaki and Xiquan Zheng and Yingying Peng and Zurab Guguchia and X. X. Wu and Qianghua Wang and X-H Fan and Wei Song and M-W Gao and Hendrik Hohmann and Matteo Durrnagel and Ronny Thomale and Jia-Xin Yin},
journal= {arXiv preprint arXiv:2510.10958},
year = {2026}
}
备注
15 pages, 5 figures; Supplementary Material included; updated to match the published version