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Growth of High-Quality Superconducting FeSe0.5 Te0.5 Thin Films Suitable for Angle-Resolved Photoemission Spectroscopy Measurements via Pulsed Laser Deposition*Supported by the Chinese Academy of Sciences under Grant No 2010Y1JB6, the National Basic Research Program of China under Grant No 2010CB923000, and the National Natural Science Foundation of China under Grant Nos 11234014 and 11227903. (August 2015)
Record Type:
Journal Article
Title:
Growth of High-Quality Superconducting FeSe0.5 Te0.5 Thin Films Suitable for Angle-Resolved Photoemission Spectroscopy Measurements via Pulsed Laser Deposition*Supported by the Chinese Academy of Sciences under Grant No 2010Y1JB6, the National Basic Research Program of China under Grant No 2010CB923000, and the National Natural Science Foundation of China under Grant Nos 11234014 and 11227903. (August 2015)
Main Title:
Growth of High-Quality Superconducting FeSe0.5 Te0.5 Thin Films Suitable for Angle-Resolved Photoemission Spectroscopy Measurements via Pulsed Laser Deposition*Supported by the Chinese Academy of Sciences under Grant No 2010Y1JB6, the National Basic Research Program of China under Grant No 2010CB923000, and the National Natural Science Foundation of China under Grant Nos 11234014 and 11227903.
<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>High-quality superconducting FeSe<sub>0.5</sub> Te<sub>0.5</sub> films are epitaxially grown on different substrates by using the pulsed laser deposition method. By measuring the transport properties and surface morphology of films grown on singlecrystal substrates of Al<sub>2</sub>O<sub>3</sub> (0001), SrTiO<sub>3</sub> (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 FeSe<sub>0.5</sub> Te<sub>0.5</sub> thin films suitable for angle-resolved photoemission spectroscopy measurements. We further report the angle-resolved photoemission spectroscopy characterization of the superconducting 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.</p> </abstract>