Zobrazeno 1 - 10
of 350
pro vyhledávání: '"Capitani, F."'
Autor:
Santos-Cottin, D., Nasrallah, S., Capitani, F., Simon, P., Homes, C. C., Akrap, A., Lobo, R. P. S. M.
We measured the far-infrared reflectivity of a KH2PO4 single crystal up to pressures of 2 GPa in the ferroelectric and paraelectric phases. We find that the nu4 vibrational mode of the PO4 tetrahedron is strongly affected by the applied pressure. At
Externí odkaz:
http://arxiv.org/abs/2402.04998
Autor:
Di Pietro, P., Mitrano, M., Caramazza, S., Capitani, F., Lupi, S., Postorino, P., Ripanti, F., Joseph, B., Ehlen, N., Grüneis, A., Sanna, A., Profeta, G., Dore, P., Perucchi, A.
Publikováno v:
Phys. Rev. B 98, 165111 (2018)
The phase diagrams of correlated systems like cuprates or pnictides high-temperature superconductors are characterized by a topological change of the Fermi surface under continuous variation of an external parameter, the so-called Lifshitz transition
Externí odkaz:
http://arxiv.org/abs/1804.07066
Autor:
Nucara, A., Corasaniti, M., Kalaboukhov, A., Ortolani, M., Falsetti, E., Sambri, A., Granozio, F. Miletto, Capitani, F., Brubach, J. -B., Roy, P., Schade, U., Calvani, P.
Publikováno v:
Phys. Rev. B 97, 155126 (2018)
We have used grazing-angle infrared spectroscopy to detect the Berreman effect (BE) in the quasi-two-dimensional electron system (q-2DES) which forms spontaneously at the interface between SrTiO$_{3}$ (STO) and a thin film of LaAlO$_3$ (LAO). From th
Externí odkaz:
http://arxiv.org/abs/1802.08181
Autor:
Joseph, B., Caramazza, S., Capitani, F., Clarté, T., Ripanti, F., Lotti, P., Lausi, A., Di Castro, D., Postorino, P., Dore, P.
Publikováno v:
J. Phys.: Condens. Matter 30 (2018) 494002
We report a study of the structural phase transitions induced by pressure in bulk black phosphorus by using both synchrotron x-ray diffraction for pressures up to 12.2 GPa and Raman spectroscopy up to 18.2 GPa. Very recently black phosphorus attracte
Externí odkaz:
http://arxiv.org/abs/1706.03706
Autor:
Capitani, F., Langerome, B., Brubach, J. -B., Roy, P., Drozdov, A., Eremets, M. I., Nicol, E. J., Carbotte, J. P., Timusk, T.
The discovery of a superconducting phase in sulfur hydride under high pressure with a critical temperature above 200 K has provided a new impetus to the search for even higher $T_c$. Theory predicted and experiment confirmed that the phase involved i
Externí odkaz:
http://arxiv.org/abs/1612.06732
Autor:
Mohamed, W. S., Nucara, A., Calestani, G., Mezzadri, F., Gilioli, E., Capitani, F., Postorino, P., Calvani, P.
Publikováno v:
Physical Review B 92, 054306 (2015)
BiMnO3 (BMO), ferromagnetic (FM) below Tc = 100 K, was believed to be also ferroelectric (FE) due to a non-centro-symmetric C2 structure, until diffraction data indicated that its space group is the centro-symmetric C2/c. Here we present infrared pho
Externí odkaz:
http://arxiv.org/abs/1602.03656
Autor:
Capitani, F., Koval, S., Fittipaldi, R., Caramazza, S., Paris, E., Mohamed, W. S., Lorenzana, J., Nucara, A., Rocco, L., Vecchione, A., Postorino, P., Calvani, P.
Publikováno v:
Physical Review B 91, 214308 (2015)
The Raman spectrum of Ba2CuGe2O7, a tetragonal insulator which develops Dzyaloshinsky- Moriya helical magnetism below TN = 3.2 K, has been detected at temperatures varying from 300 to 80 K in a single crystal, with the radiation polarized either in t
Externí odkaz:
http://arxiv.org/abs/1602.03381
Autor:
Perucchi, A., Capitani, F., Di Pietro, P., Lupi, S., Lee, S., Kang, J. H., Jiang, J., Weiss, J. D., Hellstrom, E. E., Eom, C. B., Dore, P.
Publikováno v:
Applied Physics Letters 104, 222601 (2014)
It has been recently reported (S. Lee et al., Nature Materials 12, 392, 2013) that superlattices where layers of the 8% Co-doped BaFe2As2 superconducting pnictide are intercalated with non superconducting ultrathin layers of either SrTiO3 or of oxyge
Externí odkaz:
http://arxiv.org/abs/1404.4299
Autor:
Capitani, F., Hoeppner, M., Joseph, B., Malavasi, L., Artioli, G. A., Baldassarre, L., Perucchi, A., Piccinini, M., Lupi, S., Dore, P., Boeri, L., Postorino, P.
Publikováno v:
Phys. Rev. B 88, 144303 (2013)
We present high-quality optical data and density functional perturbation theory calculations for the vibrational spectrum of solid picene (C$_{22}$H$_{14}$) under pressure up to 8 GPa. First-principles calculations reproduce with a remarkable accurac
Externí odkaz:
http://arxiv.org/abs/1306.1030
Autor:
Joseph, B., Boeri, L., Malavasi, L., Capitani, F., Artioli, G. A., Protti, S., Fagnoni, M., Albini, A., Marini, C., Baldassarre, L., Perucchi, A., Lupi, S., Postorino, P., Dore, P.
Publikováno v:
Journal of Physics: Condensed Matter 24 (2012) 252203
Recently, Mitsuhashi et al., have observed superconductivity with transition temperature up to 18 K in potassium doped picene (C22H14), a polycyclic aromatic hydrocarbon compound [Nature 464 (2010) 76]. Theoretical analysis indicate the importance of
Externí odkaz:
http://arxiv.org/abs/1205.5881