Optical properties of TiN thin films close to the superconductor–insulator transition
Baturina, Tatyana I.
Vinokur, Valerii M.
Baklanov, Mikhaïl R.
- Journal Article
Rights / licenseCreative Commons Attribution 3.0 Unported
We present the intrinsic optical properties over a broad spectral range of TiN thin films deposited on an Si/SiO2 substrate. We analyze the measured reflectivity spectra of the film-substrate multilayer structure within a well-establish procedure based on the Fresnel equation and extract the real part of the optical conductivity of TiN. We identify the metallic contribution as well as the finite energy excitations and disentangle the spectral weight distribution among them. The absorption spectrum of TiN bears some similarities with the electrodynamic response observed in the normal state of the high-temperature superconductors. Particularly, a mid-infrared feature in the optical conductivity is quite reminiscent of a pseudogap-like excitation. Show more
Journal / seriesNew Journal of Physics
Pages / Article No.
PublisherInstitute of Physics
Organisational unit03569 - Batlogg, Bertram (emeritus)
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