Zobrazeno 1 - 10
of 316
pro vyhledávání: '"P. Ciuchi"'
Autor:
Ciuchi, Federica, De Santo, Maria Penelope, Paparini, Silvia, Spina, Lorenza, Virga, Epifanio G.
Twisted hedgehogs are defects in spherical cavities with homeotropic anchoring for the nematic director that arise when twist distortions are sufficiently less energetic than splay (and bend) distortions. They bear a characteristic inversion ring, wh
Externí odkaz:
http://arxiv.org/abs/2401.02893
We carefully revisit the electron-boson scattering problem, going beyond popular semi-classical treatments. By providing numerically exact results valid at finite temperatures, we demonstrate the existence of a regime of electron-boson scattering whe
Externí odkaz:
http://arxiv.org/abs/2312.03840
Autor:
Poli, Arianna, Wagner, Niklas, Fischer, Max, Toschi, Alessandro, Sangiovanni, Giorgio, Ciuchi, Sergio
We investigate the quasi-particle and transport properties of a model describing interacting Dirac and Weyl semimetals in the presence of local Hubbard repulsion $U$, where we explicitly include a deviation from the linearity of the energy-momentum d
Externí odkaz:
http://arxiv.org/abs/2310.03653
Publikováno v:
Phys. Rev. Lett. 131, 196303 (2023)
We present a theory for band-tuned metal-insulator transitions based on the Kubo formalism. Such a transition exhibits scaling of the resistivity curves, in the regime where $T\tau >1$ or $\mu \tau>1$, where $\tau$ is the scattering time and $\mu$ th
Externí odkaz:
http://arxiv.org/abs/2307.09292
Autor:
Ciuchi, Sergio, Fratini, Simone
Publikováno v:
Phys. Rev. B 108, 235173 (2023)
We study metallic transport in an effective model that describes the coupling of electrons to fluctuating magnetic moments with full SU(2) symmetry, exhibiting characteristic behavior of metals at the approach of the Mott transition. We show that sca
Externí odkaz:
http://arxiv.org/abs/2306.12496
We study long-range interacting electrons on the triangular lattice using mixed quantum/classical simulations going beyond the usual classical descriptions of the lattice Coulomb fluid. Our results in the strong interaction limit indicate that the em
Externí odkaz:
http://arxiv.org/abs/2208.06260
Autor:
Fratini, S., Ciuchi, S.
Publikováno v:
SciPost Phys. 11, 039 (2021)
Scattering by slowly fluctuating degrees of freedom can cause a transient localization of the current-carrying electrons in metals, driving the system away from normal metallic behavior. We illustrate and characterize this general phenomenon by study
Externí odkaz:
http://arxiv.org/abs/2104.01075
Publikováno v:
Phys. Rev. Lett. 126, 206601 (2021)
We study the resistivity of three-dimensional semimetals with linear dispersion in the presence of on-site electron-electron interaction. The well-known quadratic temperature dependence of the resistivity of conventional metals is turned into an unus
Externí odkaz:
http://arxiv.org/abs/2012.07886
Publikováno v:
Phys. Rev. Lett. 125, 196403 (2020)
While the breakdown of the perturbation expansion for the many-electron problem has several formal consequences, here we unveil its physical effect: Flipping the sign of the effective electronic interaction in specific scattering channels. By decompo
Externí odkaz:
http://arxiv.org/abs/2002.12869
Publikováno v:
Phys. Rev. B 101, 155148 (2020)
We investigate the divergences appearing in the two-particle irreducible vertex functions of many-fermion systems with attractive on-site interactions. By means of dynamical mean-field theory calculations, we determine the location of singularity lin
Externí odkaz:
http://arxiv.org/abs/1912.02546