南方科技大学知识苑(SUSTech KC): Post-growth Fe deposition on the superconductivity of monolayer FeSe films on SrTi O3-δ

题名	Post-growth Fe deposition on the superconductivity of monolayer FeSe films on SrTi O3-δ
作者	Jiao，Xiaotong 1,2; Gong，Guanming 1; Zhang，Zhiyu 1; Dong，Wenfeng 1; Ding，Cui 1,3; Pan，Minghu 2; Wang，Lili 1; Xue，Qi Kun1,3,4
通讯作者	Pan，Minghu; Wang，Lili
发表日期	2022-06-01
DOI	10.1103/PhysRevMaterials.6.064803
发表期刊	Physical Review Materials 影响因子和分区
EISSN	2475-9953
卷号	6 期号:6
摘要	The superconductivity in bulk FeSe depends sensitively on the stoichiometry, ditto for the monolayer FeSe films grown on SrTiO3-δ and other substrates. To tune the stoichiometry, we deposit Fe onto monolayer FeSe films after epitaxial growth. Using in situ low-temperature scanning tunneling microscopy/spectroscopy, we find that the postdeposited Fe atoms incorporate into monolayer films and combine with excess Se to form FeSe, with an upper coverage limit of ∼0.4 unit-cell. Consequently, the superconducting gap concentrates in 10 to 12 meV. The work demonstrates a simple method for stoichiometry tuning and improving the spatial uniformity of monolayer FeSe films. Compared with the gap of ∼15 to 20 meV for the annealed films, the smaller superconducting gap indicates weakened FeSe-TiO2 coupling due to interfacial Se atom substitution.
相关链接	[Scopus记录]
收录类别	SCI ; EI
语种	英语
学校署名	其他
WOS记录号	WOS:000817850500001
EI入藏号	20222912368503
EI主题词	Binary alloys ; Iron ; Scanning tunneling microscopy ; Selenium ; Selenium compounds ; Stoichiometry ; Superconducting films ; Temperature ; Thin films ; Titanium dioxide
EI分类号	Iron:545.1 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermodynamics:641.1 ; Superconducting Materials:708.3 ; Physical Chemistry:801.4 ; Inorganic Compounds:804.2
Scopus记录号	2-s2.0-85134081061
来源库	Scopus
引用统计	被引频次[WOS]：6
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/401642
专题	理学院_物理系
作者单位	1.State Key Laboratory of Low-Dimensional Quantum Physics,Department of Physics,Tsinghua University,Beijing,100084,China 2.School of Physics & Information Technology,Shaanxi Normal University,Xian,710119,China 3.Beijing Academy of Quantum Information Sciences,Beijing,100193,China 4.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
推荐引用方式 GB/T 7714	Jiao，Xiaotong,Gong，Guanming,Zhang，Zhiyu,et al. Post-growth Fe deposition on the superconductivity of monolayer FeSe films on SrTi O3-δ[J]. Physical Review Materials,2022,6(6).
APA	Jiao，Xiaotong.,Gong，Guanming.,Zhang，Zhiyu.,Dong，Wenfeng.,Ding，Cui.,...&Xue，Qi Kun.(2022).Post-growth Fe deposition on the superconductivity of monolayer FeSe films on SrTi O3-δ.Physical Review Materials,6(6).
MLA	Jiao，Xiaotong,et al."Post-growth Fe deposition on the superconductivity of monolayer FeSe films on SrTi O3-δ".Physical Review Materials 6.6(2022).