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S. V. DORDEVIC1,*
The last few years have seen a flurry of interest in the so-called interface superconductivity. Superconductivity with critical temperature as high as 100 K has been reported in FeSe/SrTiO3 structures. The roles of the two materials and their interface is currently being debated. I report here the optical properties of a SrTiO3 substrate that is used for these structures. Room temperature spectra are collected over a broad frequency range, from far-infrared to near-ultraviolet. Overall, the transmission is found to be very low, typically below 4 %. The band gap, above which the substrate is completely opaque, is found to be Eg = 3.21 eV. The reflectance, on the other hand, is higher and reveals signatures of interband transitions..
STO, SrTiO3 substrate, Transmission, Reflection, Interface superconductivity.
S. V. DORDEVIC, Optical properties of SrTiO3: the substrate for interface superconductivity, Optoelectronics and Advanced Materials - Rapid Communications, 11, 9-10, September-October 2017, pp.586-589 (2017).
Submitted at: Oct. 18, 2016
Accepted at: Oct. 10, 2017
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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