Autor: Romano, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The Pseudogap Phenomenon in High-T$\text{}_{c}$ Superconductors
Autorzy:: Ranninger, J.
Romano, A.
Powiązania:: https://bibliotekanauki.pl/articles/2011238.pdf
Data publikacji:: 2000-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.20.-z
74.25.-q
74.25.Jb
Opis:: We review the possible mechanisms leading up to the phenomenon of a pseudogap which characterizes the normal-state properties of high-T$\text{}_{c}$ superconductors. We suggest that this pseudogap is not due to superconducting phase fluctuations and hence is not related to a crossover between a BCS state of Cooper pairs and a Bose-Einstein condensation of local pairs. We rather argue that it is due to uncorrelated pairing which is already manifest in the local electronic structure and accessible by photoemission and tunneling experiments.
Źródło:: Acta Physica Polonica A; 2000, 97, 1; 157-164
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Superconductivity in Anderson Lattice Model
Autorzy:: Romano, A.
Noce, C.
Micnas, R.
Powiązania:: https://bibliotekanauki.pl/articles/1955827.pdf
Data publikacji:: 1997-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.72.-h
74.70.Tx
74.25.-q
Opis:: We study the superconducting instabilities generated by the inclusion in the Anderson lattice model of a density-density attractive potential between correlated electrons on nearest-neighbouring sites. Using a description of the normal phase based on a perturbative expansion around the atomic limit, we treat the attractive potential in the broken-symmetry Hartree-Fock scheme and analyze which of the possible symmetries of the superconducting order parameter leads to the highest possible transition temperature in the case of a two-dimensional square lattice. For values of the on-site f-repulsion large compared to the hopping amplitude, a suppression of any possible superconducting phase occurs, regardless of the symmetry of the order parameter.
Źródło:: Acta Physica Polonica A; 1997, 91, 2; 381-385
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Ferromagnetism in Hubbard Chains
Autorzy:: Cuoco, M.
Noce, C.
Romano, A.
Powiązania:: https://bibliotekanauki.pl/articles/1955828.pdf
Data publikacji:: 1997-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.10.Fd
75.10.Lp
Opis:: We analyze the possible occurrence of ferromagnetism in the Hubbard model, by means of an exact diagonalization study performed on 3- to 8-site chains with periodic boundary conditions. In the case of one hole in the half-filled configuration, we find that the Nagaoka state is reached only in the 3- and in the 4-site case. Ground states characterized by unsaturated ferromagnetism are found when the case of more than one hole is considered.
Źródło:: Acta Physica Polonica A; 1997, 91, 2; 387-390
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Interplay Between Spin-Orbit Coupling and Structural Deformations in Heavy Transition-Metal Oxides with Tetrahedral Coordination
Autorzy:: Forte, F.
Guerra, D.
Avella, A.
Autieri, C.
Romano, A.
Noce, C.
Powiązania:: https://bibliotekanauki.pl/articles/1030491.pdf
Data publikacji:: 2018-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.70.Ej
75.25.Dk
71.27.+a
Opis:: We analyze the effects of a large spin-orbit coupling on the magnetic state of a d¹ transition-metal ion located in a tetrahedral environment. While in the ideal tetrahedral symmetry the spin-orbit coupling acts only as a perturbation on the atomic energy levels set by the crystal-field splitting, we demonstrate that its effects are strongly enhanced in the case of distorted geometries. In particular, we consider the specific case in which the tetrahedron is compressed along the z direction, and show that, by increasing the degree of flattening, a large spin-orbit interaction (i) can induce a substantial anisotropic, unquenched orbital momentum and (ii) can affect the hierarchy of the lowest energy levels that are involved in the magnetic exchange.
Źródło:: Acta Physica Polonica A; 2018, 133, 3; 394-397
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: The INSIDE Project: Innovative Solutions for In-Beam Dosimetry in Hadrontherapy
Autorzy:: Marafini, M.
Attili, A.
Battistoni, G.
Belcari, N.
Bisogni, M.
Camarlinghi, N.
Cappucci, F.
Cecchetti, M.
Cerello, P.
Ciciriello, F.
Cirrone, G.
Coli, S.
Corsi, F.
Cuttone, G.
De Lucia, E.
Ferretti, S.
Faccini, R.
Fiorina, E.
Frallicciardi, P.
Giraudo, G.
Kostara, E.
Kraan, A.
Licciulli, F.
Liu, B.
Marino, N.
Marzocca, C.
Matarrese, G.
Morone, C.
Morrocchi, M.
Muraro, S.
Patera, V.
Pennazio, F.
Peroni, C.
Piersanti, L.
Piliero, M.
Pirrone, G.
Rivetti, A.
Romano, F.
Rosso, V.
Sala, P.
Sarti, A.
Sciubba, A.
Sportelli, G.
Voena, C.
Wheadon, R.
Del Guerra, A.
Powiązania:: https://bibliotekanauki.pl/articles/1402609.pdf
Data publikacji:: 2015-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 87.53.Bn
87.53.Jw
87.53.Kn
87.55.N-
87.55.ne
87.57.uq
Opis:: The INSIDE project addresses the online dose monitoring in particle therapy issue. The proposed detectors exploit the secondary neutral and charged particles emitted during the treatment by the irradiated volumes. The new detection techniques allow to return and online a measurement of the released dose and the Bragg peak position.
Źródło:: Acta Physica Polonica A; 2015, 127, 5; 1465-1467
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 6.

Tytuł:: A Study of Monitoring Performances with the INSIDE System
Autorzy:: Pennazio, F.
Attili, A.
Battistoni, G.
Belcari, N.
Bisogni, M.
Camarlinghi, N.
Cappucci, F.
Cecchetti, M.
Cerello, P.
Ciciriello, F.
Cirrone, G.
Coli, S.
Corsi, F.
Cuttone, G.
De Lucia, E.
Ferretti, S.
Faccini, R.
Fiorina, E.
Frallicciardi, P.
Giraudo, G.
Kostara, E.
Kraan, A.
Licciulli, F.
Liu, B.
Marafini, M.
Marino, N.
Marzocca, C.
Matarrese, G.
Morone, C.
Morrocchi, M.
Muraro, S.
Patera, V.
Peroni, C.
Piersanti, L.
Piliero, M.
Pirrone, G.
Rivetti, A.
Romano, F.
Rosso, V.
Sala, P.
Sarti, A.
Sciubba, A.
Sportelli, G.
Voena, C.
Wheadon, R.
Del Guerra, A.
Powiązania:: https://bibliotekanauki.pl/articles/1402611.pdf
Data publikacji:: 2015-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 87.53.Bn
87.53.Jw
87.53.Kn
87.55.N-
87.55.ne
87.57.uq
Opis:: The INSIDE collaboration aims to build an on-line hadrontherapy monitoring system, based on a dual-head in-beam PET scanner and a secondary charged particles profiler. In this work preliminary experimental results are presented. The validation of the FLUKA-based Monte Carlo simulation tool is shown together with the expected scanner performances.
Źródło:: Acta Physica Polonica A; 2015, 127, 5; 1468-1470
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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