Oct 30, 2024 · Here we use momentum-selective high-resolution electron energy loss spectroscopy to atomically resolve the phonons at the FeSe/STO interface. We uncover new optical phonon modes, coupling...

Nov 24, 2014 · In this work, we report electrical transport measurements on single-layer films of FeSe grown on Nb-doped SrTiO 3 substrates using an in situ four-point probe (4PP) technique. We found that...

Feb 15, 2019 · Here, Song and Yu et al. reveal the evidence of cooperation between intrinsic pairing interaction in FeSe and interfacial electron–phonon coupling to enhance the Tc at the FeSe/SrTiO3...

Jun 13, 2018 · This observation is used to detect excess Fe and estimate its quantity in single-layer FeSe/STO films. The amount of excess Fe detected is at least 20%, which is surprisingly high for superconducting single-layer FeSe/STO films.

FeSe films on STO could increase T c up to the same range of critical temperatures, including inducing high T c beginning from a nonsuperconducting 1FeSeSTO sample. The increase in superconducting gap with decrease in the thickness of the FeSe thin film led them to conclude that some interfacial (or substrate)effectsarecrucial.Seoetal.[29 ...

Mar 14, 2022 · One of the most concerning research subjects is to explore the nature of the interfacial coupling. Here, we performed a comparative study between the isostructural CoSe/STO and FeSe/STO by measuring the phonons and plasmons via …

In 2016, a transmission-electron-microscope (TEM) study revealed that the topmost layer of the STO substrate is indeed TiO 2 double layers rather than the TiO 2 layer of simple bulk termination [7].

Mar 19, 2025 · Our results demonstrate that the substrate profoundly alters both the normal-state and superconducting properties of FeSe. We identify proximity-induced superconductivity in the interfacial TiO$_2$ layer of STO, due to hybridization between Fe $d$ and O $p$ orbitals.

Mar 16, 2018 · We present the results of a coordinated study of electrical transport, low temperature electron energy-loss spectroscopy (EELS), and high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) measurements on FeSe/STO films of different thicknesses.

Feb 10, 2017 · A systematic comparison of 1 ML FeSe on ${\mathrm{TiO}}_{2}$ with other systems in the FeSe family shows that while charge transfer alone can enhance ${T}_{c}$, it is only with the addition of interfacial electron-phonon coupling that ${T}_{c}$ can be increased to the level seen in 1 ML FeSe on STO.