High oriented FeSe thin film on GaAs(100) substrate prepared by low-pressure metalorganic chemical vapor deposition

FeSe quantum dots for in vivo multiphoton biomedical imaging

“…1E). The binding energy of the QDs agrees well with the PbO-type FeSe ( 28 , 29 ), in which the Fe 2p 3/2 and Se 3d peaks were shifted to ca. 711.0 and 55.7 eV, respectively (fig.…”

Impact of atomic defects in the electronic states of FeSe 1−x S x superconducting crystals

“…The line shape and energy location of the Fe 2p peaks in our XPS spectra for in-situ cleaved surfaces are very similar to those measured in in-situ grown or Ar-sputtered surfaces of FeSe films [34,[36][37][38][39][40]. Peaks in the ex-situ cleaved sample are in contrast more rounded, as observed in data for ex-situ grown FeSe films [33,34,36,38]. In the latter case the Fe 2p 3/2 peak is generally detected around 710 eV, the energy expected for the Fe 2 O 3 oxide [33,34,36].…”

“…Peaks in the ex-situ cleaved sample are in contrast more rounded, as observed in data for ex-situ grown FeSe films [33,34,36,38]. In the latter case the Fe 2p 3/2 peak is generally detected around 710 eV, the energy expected for the Fe 2 O 3 oxide [33,34,36]. Thus, these spectral line shape and energy shifting of ∼3 eV for the Fe 2p levels are strongly affected by the sample surface preparation.…”

“…The collected spectra in the FeSe 1−x S x samples were vertically shifted for clarity. In the case of pure FeSe, our data are obtained in an in-situ cleaved surface of a high purity single crystal and cover a wider energy range with better signal to noise ratio and/or better energy resolution than previously reported XPS spectra [33][34][35][36][37][38][39][40]. In all spectra of figure 4, Fe and Se contributions are detected at energies close to the ones corresponding to the tabulated peaks for the different core levels for the pure elements (indicated with dotted lines) [41].…”