DICP OpenIR
Origin of charge transfer and enhanced electron-phonon coupling in single unit-cell FeSe films on SrTiO3
Zhang, Huimin1; Zhang, Ding2,3; Lu, Xiaowei1,4; Liu, Chong2; Zhou, Guanyu2; Ma, Xucun2,3; Wang, Lili2,3; Jiang, Peng1,5; Xue, Qi-Kun2,3; Bao, Xinhe1,5
Source PublicationNATURE COMMUNICATIONS
2017-08-09
DOI10.1038/s41467-017-00281-5
Volume8
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology
WOS SubjectMultidisciplinary Sciences
WOS Research AreaScience & Technology - Other Topics
WOS KeywordHIGH-TEMPERATURE SUPERCONDUCTIVITY ; THIN-FILMS ; PHOTOEMISSION-SPECTROSCOPY ; DOPED SRTIO3 ; 65 K ; SUBSTRATE
AbstractInterface charge transfer and electron-phonon coupling have been suggested to play a crucial role in the recently discovered high-temperature superconductivity of single unit-cell FeSe films on SrTiO3. However, their origin remains elusive. Here, using ultraviolet photoemission spectroscopy and element-sensitive X-ray photoemission spectroscopy, we identify the strengthened Ti-O bond that contributes to the interface enhanced electron-phonon coupling and unveil the band bending at the FeSe/SrTiO3 interface that leads to the charge transfer from SrTiO3 to FeSe films. We also observe band renormalization that accompanies the onset of superconductivity. Our results not only provide valuable insights into the mechanism of the interface-enhanced superconductivity, but also point out a promising route toward designing novel superconductors in heterostructures with band bending-induced charge transfer and interfacial enhanced electron-phonon coupling.
Language英语
WOS IDWOS:000407198800003
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/149937
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, CAS Ctr Excellence Nanosci, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
3.Collaborat Innovat Ctr Quantum Matter, Beijing 100084, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Huimin,Zhang, Ding,Lu, Xiaowei,et al. Origin of charge transfer and enhanced electron-phonon coupling in single unit-cell FeSe films on SrTiO3[J]. NATURE COMMUNICATIONS,2017,8.
APA Zhang, Huimin.,Zhang, Ding.,Lu, Xiaowei.,Liu, Chong.,Zhou, Guanyu.,...&Bao, Xinhe.(2017).Origin of charge transfer and enhanced electron-phonon coupling in single unit-cell FeSe films on SrTiO3.NATURE COMMUNICATIONS,8.
MLA Zhang, Huimin,et al."Origin of charge transfer and enhanced electron-phonon coupling in single unit-cell FeSe films on SrTiO3".NATURE COMMUNICATIONS 8(2017).
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