Superconducting transition of FeSe / SrTi O3 induced by adsorption of semiconducting organic molecules

Jiaqi Guan; Jian Liu; Bing Liu; Xiaochun Huang; Qing Zhu; Xuetao Zhu; Jiatao Sun; Sheng Meng; Weihua Wang; Jiandong Guo

doi:10.1103/PhysRevB.95.205405

Superconducting transition of FeSe / SrTi O3 induced by adsorption of semiconducting organic molecules

Jiaqi Guan, Jian Liu, Bing Liu, Xiaochun Huang, Qing Zhu, Xuetao Zhu, Jiatao Sun, Sheng Meng^*, Weihua Wang, Jiandong Guo

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

We prepared superconducting and nonsuperconducting FeSe films on SrTiO3(001) substrates (FeSe/STO) and investigated the superconducting transition induced by charge transfer between organic molecules and FeSe layers by low temperature scanning tunneling microscopy and spectroscopy. At low coverage, donor- and acceptor-type molecules adsorbed preferentially on the nonsuperconducting and superconducting FeSe layers, respectively. Superconductivity was induced by donor molecules on nonsuperconducting FeSe layer, while the superconductivity was suppressed near acceptor molecules. The corresponding evolutions of electronic states and work function were also resolved by scanning tunneling microscopy. These results illustrate the important role played by local electron concentration in the superconducting transition of FeSe/STO.

Original language	English
Article number	205405
Journal	Physical Review B
Volume	95
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevB.95.205405
Publication status	Published - 4 May 2017
Externally published	Yes

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title = "Superconducting transition of FeSe / SrTi O3 induced by adsorption of semiconducting organic molecules",

abstract = "We prepared superconducting and nonsuperconducting FeSe films on SrTiO3(001) substrates (FeSe/STO) and investigated the superconducting transition induced by charge transfer between organic molecules and FeSe layers by low temperature scanning tunneling microscopy and spectroscopy. At low coverage, donor- and acceptor-type molecules adsorbed preferentially on the nonsuperconducting and superconducting FeSe layers, respectively. Superconductivity was induced by donor molecules on nonsuperconducting FeSe layer, while the superconductivity was suppressed near acceptor molecules. The corresponding evolutions of electronic states and work function were also resolved by scanning tunneling microscopy. These results illustrate the important role played by local electron concentration in the superconducting transition of FeSe/STO.",

author = "Jiaqi Guan and Jian Liu and Bing Liu and Xiaochun Huang and Qing Zhu and Xuetao Zhu and Jiatao Sun and Sheng Meng and Weihua Wang and Jiandong Guo",

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T1 - Superconducting transition of FeSe / SrTi O3 induced by adsorption of semiconducting organic molecules

AU - Guan, Jiaqi

AU - Liu, Jian

AU - Liu, Bing

AU - Huang, Xiaochun

AU - Zhu, Qing

AU - Zhu, Xuetao

AU - Sun, Jiatao

AU - Meng, Sheng

AU - Wang, Weihua

AU - Guo, Jiandong

PY - 2017/5/4

Y1 - 2017/5/4

N2 - We prepared superconducting and nonsuperconducting FeSe films on SrTiO3(001) substrates (FeSe/STO) and investigated the superconducting transition induced by charge transfer between organic molecules and FeSe layers by low temperature scanning tunneling microscopy and spectroscopy. At low coverage, donor- and acceptor-type molecules adsorbed preferentially on the nonsuperconducting and superconducting FeSe layers, respectively. Superconductivity was induced by donor molecules on nonsuperconducting FeSe layer, while the superconductivity was suppressed near acceptor molecules. The corresponding evolutions of electronic states and work function were also resolved by scanning tunneling microscopy. These results illustrate the important role played by local electron concentration in the superconducting transition of FeSe/STO.

AB - We prepared superconducting and nonsuperconducting FeSe films on SrTiO3(001) substrates (FeSe/STO) and investigated the superconducting transition induced by charge transfer between organic molecules and FeSe layers by low temperature scanning tunneling microscopy and spectroscopy. At low coverage, donor- and acceptor-type molecules adsorbed preferentially on the nonsuperconducting and superconducting FeSe layers, respectively. Superconductivity was induced by donor molecules on nonsuperconducting FeSe layer, while the superconductivity was suppressed near acceptor molecules. The corresponding evolutions of electronic states and work function were also resolved by scanning tunneling microscopy. These results illustrate the important role played by local electron concentration in the superconducting transition of FeSe/STO.

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DO - 10.1103/PhysRevB.95.205405

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VL - 95

JO - Physical Review B

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Superconducting transition of FeSe / SrTi O3 induced by adsorption of semiconducting organic molecules

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