Growth of High-Quality Superconducting FeSe0.5Te0.5 Thin Films Suitable for Angle-Resolved Photoemission Spectroscopy Measurements via Pulsed Laser Deposition

High-quality superconducting FeSe0.5 Te0.5 films are epitaxiMly grown on different substrates by using the pulsed laser deposition method. By measuring the transport properties and surface morphology of films grown on single- crystal substrates of Al2O3 （0001）, SrTiO3 （001）, and MgO （001）, as well a...

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Published inChinese physics letters Vol. 32; no. 8; pp. 144 - 147
Main Author 孔万东 刘治国 吴尚飞 王刚 钱天 殷嘉鑫 夏芮岩 颜雷 丁洪
Format Journal Article
LanguageEnglish
Published 01.08.2015
Subjects
Band structure of solids
Epitaxial growth
MgO（001）
Photoelectron spectroscopy
Pulsed laser deposition
Substrates
Superconductivity
Superconductors
Thin films
反射高能电子衍射
电子能谱测量
脉冲激光沉积法
薄膜生长
角分辨光电子能谱
质量
超导薄膜
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ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/32/8/087401

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Summary:High-quality superconducting FeSe0.5 Te0.5 films are epitaxiMly grown on different substrates by using the pulsed laser deposition method. By measuring the transport properties and surface morphology of films grown on single- crystal substrates of Al2O3 （0001）, SrTiO3 （001）, and MgO （001）, as well as monitoring the real-time growth process on MgO substrates with reflection high energy electron diffraction, we find the appropriate parameters for epitaxial growth of high-quality FeSe0.5 Te0.5 thin films suitable for angle-resolved photoemission spectroscopy measurements. We further report the angle-resolved photoemission spectroscopy characterization of the super- conducting films. The clearly resolved Fermi surfaces and the band structure suggest a sample quality that is as good as that of high-quality single-crystals, demonstrating that the pulsed laser deposition method can serve as a promising technique for in situ preparation and manipulation of iron-based superconducting thin films, which may bring new prosperity to angle-resolved photoemission spectroscopy research on iron-based superconductors.
Bibliography:KONG Wan-Dong, LIU Zhi-Guo, WU Shang-Fei , WANG Gang, QIAN Tian, YIN Jia-Xin, RICHARD Pierre, YAN Lei, DING Hong（1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 2 Collaborative Innovation Center of Quantum Matter, Beijing 100871）
11-1959/O4
High-quality superconducting FeSe0.5 Te0.5 films are epitaxiMly grown on different substrates by using the pulsed laser deposition method. By measuring the transport properties and surface morphology of films grown on single- crystal substrates of Al2O3 （0001）, SrTiO3 （001）, and MgO （001）, as well as monitoring the real-time growth process on MgO substrates with reflection high energy electron diffraction, we find the appropriate parameters for epitaxial growth of high-quality FeSe0.5 Te0.5 thin films suitable for angle-resolved photoemission spectroscopy measurements. We further report the angle-resolved photoemission spectroscopy characterization of the super- conducting films. The clearly resolved Fermi surfaces and the band structure suggest a sample quality that is as good as that of high-quality single-crystals, demonstrating that the pulsed laser deposition method can serve as a promising technique for in situ preparation and manipulation of iron-based superconducting thin films, which may bring new prosperity to angle-resolved photoemission spectroscopy research on iron-based superconductors.
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/32/8/087401