Andrea Gauzzi

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Mixed-valence manganites with the ABO3 perovskite structure display a variety of magnetic and structural transitions, dramatic changes of electrical conductivity and magnetoresistance effects. The physical properties vary with the relative concentration of Mn3+ and Mn4+ in the octahedral corner-sharing network, and the proportion of these two cations is(More)
Lanthanide oxysulfide nanoparticles have recently attracted interest in view of their potential applications, such as lighting devices and MRI contrast agents, which requires a good stability in air and a controlled surface. In order to address these issues, in this work, air-sensitive Ce2O2S nanoparticles of hexagonal shape were successfully prepared and(More)
There has been increasing interest in materials where relativistic effects induce non-trivial electronic states with promise for spintronics applications. One example is the splitting of bands with opposite spin chirality produced by the Rashba spin-orbit coupling in asymmetric potentials. Sizable splittings have been hitherto obtained using either heavy(More)
By means of high-pressure synthesis in the 4-6 GPa range, we report on the successful growth of high-quality 1T-V1+xS2 single crystals with controlled concentration, x = 0.09-0.17, of self-intercalated V atoms in the van der Waals gap. A systematic X-ray diffraction and energy-dispersive X-ray spectroscopy study unveils a linear decrease of x with the(More)
  • Matteo D’Astuto, Ikuya Yamada, +8 authors Matteo d’Astuto
  • 2017
We present a comprehensive study of the phonon dispersion in an underdoped, superconducting Ca2−xCuO2Cl2 crystal. We interpret the results using lattice dynamical calculations based on a shell model, and we compare the results, to other hole-doped cuprates, in particular to the ones isomorphic to La2−xSrxCuO4 (LSCO). We found that an anomalous dip in the(More)
The subject of this thesis is the study of the magnetic properties of cobalt nanowires self-assembled in a cerium oxide matrix grown epitaxially on a SrTiO3(001) substrate. The spontaneous self-assembly of Co nanowires was evidenced in strongly Co-doped thin films grown by pulsed laser deposition. The metallic character of Co has been attested by analysis(More)
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