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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
刊名NATURE COMMUNICATIONS
2017-08-09
DOI10.1038/s41467-017-00281-5
8
收录类别SCI
文章类型Article
WOS标题词Science & Technology
类目[WOS]Multidisciplinary Sciences
研究领域[WOS]Science & Technology - Other Topics
关键词[WOS]HIGH-TEMPERATURE SUPERCONDUCTIVITY ; THIN-FILMS ; PHOTOEMISSION-SPECTROSCOPY ; DOPED SRTIO3 ; 65 K ; SUBSTRATE
英文摘要Interface 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.
语种英语
WOS记录号WOS:000407198800003
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/149937
专题中国科学院大连化学物理研究所
作者单位1.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
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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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