Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Manghi, Franca"'
Autor:
Manghi, Franca
Publikováno v:
Phys. Rev. B 103, 115114 (2021)
We study the effects of e-e interaction in a 3D Crystalline Topological Insulator by adding on-site repulsion to the single-particle Hamiltonian and solving the many-body problem within Cluster Perturbation Theory. The goal is to clarify how many bod
Externí odkaz:
http://arxiv.org/abs/2012.04513
Publikováno v:
Phys. Rev. B 95, 235430 (2017)
An intense laser field in the high-frequency regime drives carriers in graphene nanoribbons (GNRs) out of equilibrium and creates topologically-protected edge states. Using Floquet theory on driven GNRs, we calculate the time evolution of local excit
Externí odkaz:
http://arxiv.org/abs/1706.06420
Based on a solution of the Floquet Hamiltonian we have studied the time-evolution of electronic states in graphene nanoribbons driven out of equilibrium by time-dependent electromagnetic fields in different regimes of intensity, polarization and freq
Externí odkaz:
http://arxiv.org/abs/1702.06349
Autor:
Marocchi, Simone, Ferriani, Paolo, Caffrey, Nuala Mai, Manghi, Franca, Heinze, Stefan, Bellini, Valerio
Using first-principles calculations we demonstrate sizable exchange coupling between a magnetic molecule and a magnetic substrate via a graphene layer. As a model system we consider cobaltocene (CoCp$_2$) adsorbed on graphene deposited on Ni(111). We
Externí odkaz:
http://arxiv.org/abs/1304.6665
Autor:
Manghi, Franca, Petocchi, Francesco
Based on the Cluster Perturbation solution of the Hubbard hamiltonian for a 2-D honeycomb lattice we present quasiparticle band structures of nanoribbons at half filling as a function of the on-site electron-electron repulsion. We show that at modera
Externí odkaz:
http://arxiv.org/abs/1303.4541
X-ray absorption and its dependence on the polarization of light is a powerful tool to investigate the orbital and spin moments of magnetic materials and their orientation relative to crystalline axes. Here, we present a program for the calculation o
Externí odkaz:
http://arxiv.org/abs/1104.1558
Publikováno v:
Europhysics Letters Vol. 58(4), pp. 555-561 (2002).
We study electron molecules in realistic vertically coupled quantum dots in a strong magnetic field. Computing the energy spectrum, pair correlation functions, and dynamical form factor as a function of inter-dot coupling via diagonalization of the m
Externí odkaz:
http://arxiv.org/abs/cond-mat/0202183
Publikováno v:
Physical Review B 59, 10165 (1999).
We study the energy spectra of small three-dimensional (3D) and two-dimensional (2D) semiconductor quantum dots through different theoretical approaches (single-site Hubbard and Hartree-Fock hamiltonians); in the smallest dots we also compare with ex
Externí odkaz:
http://arxiv.org/abs/cond-mat/9812428
Autor:
Manghi, Franca, Rontani, Massimo
Publikováno v:
Newsletter n. 24, December 1997, "Highlight of the Month", PSIK Network
We present the results of a recently developed approach where the interplay between the itinerant and localized character of electrons in narrow band materials is described by adding on-site correlation effects to a first principle band calculation:
Externí odkaz:
http://arxiv.org/abs/cond-mat/9712180
Publikováno v:
Applied Physics Letters 72, 957 (1998).
We show that the addition spectra of semiconductor quantum dots in the presence of magnetic field can be studied through a theoretical scheme that allows an accurate and practical treatment of the single particle states and electron-electron interact
Externí odkaz:
http://arxiv.org/abs/cond-mat/9711276