Zobrazeno 1 - 10
of 1 158
pro vyhledávání: '"Casula, M."'
Autor:
Santos-Cottin, D., Casula, M., Medici, L. de', Mardelé, F. Le, Wyzula, J., Orlita, M., Klein, Y., Gauzzi, A., Akrap, A., Lobo, R. P. S. M
We investigate the optical conductivity and far-infrared magneto-optical response of BaNiS$_2$, a simple square-lattice semimetal characterized by Dirac nodal lines that disperse exclusively along the out-of-plane direction. With the magnetic field a
Externí odkaz:
http://arxiv.org/abs/2104.05521
Autor:
Nilforoushan, N., Casula, M., Amaricci, A., Caputo, M., Caillaux, J., Khalil, L., Papalazarou, E., Simon, P., Perfetti, L., Vobornik, I., Das, P. K., Fujii, J., Barinov, A., Santos-Cottin, D., Klein, Y., Fabrizio, M., Gauzzi, A., Marsi, M.
Publikováno v:
PNAS 2021 Vol. 118 No. 33 e2108617118
Dirac fermions play a central role in the study of topological phases, for they can generate a variety of exotic states, such as Weyl semimetals and topological insulators. The control and manipulation of Dirac fermions constitute a fundamental step
Externí odkaz:
http://arxiv.org/abs/1905.12210
Autor:
Santos-Cottin, D., Klein, Y., Werner, Ph., Miyake, T., Medici, L. de', Gauzzi, A., Lobo, R. P. S. M., Casula, M.
Publikováno v:
Phys. Rev. Materials 2, 105001 (2018)
Optical conductivity measurements on a BaCoS2 single crystal show an unusual linear behavior over a broad spectral range. In the paramagnetic phase above 300 K, the spectrum shows no gap, which contradicts the previously proposed scenario of a charge
Externí odkaz:
http://arxiv.org/abs/1712.01539
Publikováno v:
Phys. Rev. B 94, 245108 (2016)
We present a systematic investigation of the special twist method introduced by Rajagopal $\textit{et al.}$ [ Phys. Rev. B 51, 10591 (1995) ] for reducing finite-size effects in correlated calculations of periodic extended systems with Coulomb intera
Externí odkaz:
http://arxiv.org/abs/1606.06205
Publikováno v:
Physical Review B 91, 081101(R) (2015)
The cerium alpha-gamma phase transition is characterized by means of a many-body Jastrow-correlated wave function, which minimizes the variational energy of the first-principles scalar-relativistic Hamiltonian, and includes correlation effects in a n
Externí odkaz:
http://arxiv.org/abs/1504.04551
Autor:
Brouet, V., Lin, Ping-Hui, Texier, Y., Bobroff, J., Taleb-Ibrahimi, A., Fevre, P. Le, Bertran, F., Casula, M., Werner, P., Biermann, S., Rullier-Albenque, F., Forget, A., Colson, D.
Using angle-resolved photoemission spectroscopy, we study the evolution of the number of carriers in Ba(Fe(1-x)Cox)2As2 as a function of Co content and temperature. We show that there is a k-dependent energy shift compared to density functional calcu
Externí odkaz:
http://arxiv.org/abs/1301.6891
Publikováno v:
Phys. Rev. Lett. 109, 126408 (2012)
We provide a prescription for constructing Hamiltonians representing the low energy physics of correlated electron materials with dynamically screened Coulomb interactions. The key feature is a renormalization of the hopping and hybridization paramet
Externí odkaz:
http://arxiv.org/abs/1204.4900
Autor:
Helbig, N., Fuks, J. I., Casula, M., Verstraete, M. J., Marques, M. A. L., Tokatly, I. V., Rubio, A.
We present a local density approximation (LDA) for one-dimensional (1D) systems interacting via the soft-Coulomb interaction based on quantum Monte-Carlo calculations. Results for the ground-state energies and ionization potentials of finite 1D syste
Externí odkaz:
http://arxiv.org/abs/1101.2564
Publikováno v:
J. Chem. Phys. 131, 154116 (2009)
We introduce a method for accurate quantum chemical calculations based on a simple variational wave function, defined by a single geminal that couples all the electrons into singlet pairs, combined with a real space correlation factor. The method use
Externí odkaz:
http://arxiv.org/abs/0907.1390
Autor:
Cadoni, M., Casula, M.
Publikováno v:
Gen.Rel.Grav.42:103-112,2010
We investigate Einstein theories of gravity, coupled to a scalar field \vphi and point-like matter, which are characterized by a scalar field-dependent matter coupling function e^{H(\vphi)}. We show that under mild constraints on the form of the pote
Externí odkaz:
http://arxiv.org/abs/0901.1017