تقرير
Checkerboard order state in superconducting FeSe/SrTiO3(001) monolayer
| العنوان: | Checkerboard order state in superconducting FeSe/SrTiO3(001) monolayer |
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| المؤلفون: | Xue, Cheng-Long, Yuan, Qian-Qian, Xu, Yong-Jie, Li, Qi-Yuan, Dou, Li-Guo, Jia, Zhen-Yu, Li, Shao-Chun |
| المصدر: | Phys. Rev. B 107, 134516 (2023) |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | Ordered electronic states have been extensively explored in cuprates and iron-based unconventional superconductors, but seldom observed in the epitaxial FeSe/SrTiO3(001) monolayer (FeSe/STO) with an enhanced superconducting transition temperature (Tc). Here, by using scanning tunneling microscopy/ spectroscopy (STM/STS), we reveal a checkerboard charge order in the epitaxial FeSe/STO monolayer, with a period of four times the inter-Fe-atom distance along two perpendicular directions of the Fe lattice. This ordered state is uniquely present in the superconducting FeSe/STO monolayer, even at liquid nitrogen temperature, but absent in the non-superconducting FeSe monolayer or bilayer. Quasiparticle interference (QPI) measurements further confirm it as a static order without an energy-dependent dispersion and gapped out within the superconductivity gap. The intensity of the charge order shows an enhancement near the superconducting transition temperature, thus implying a correlation with the high-Tc superconductivity in the FeSe/STO monolayer. This study provides a new basis for exploring the ordered electronic states and their interplay with high-Tc superconductivity in the FeSe monolayer. Comment: 22 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.107.134516 |
| URL الوصول: | http://arxiv.org/abs/2308.15722 |
| رقم الأكسشن: | edsarx.2308.15722 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.107.134516 |
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