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43 papers · 1 filter
Time-evolution of excitations in normal Fermi liquids
Y. Pavlyukh, A. Rubio, J. Berakdar
We inspect the initial and the long time evolution of excitations a Fermi liquids by analyzing the time behavior of the electron spectral function. Focusing on the short-time limit…
Tight binding models for ultracold atoms in honeycomb optical lattices
Julen Ibañez-Azpiroz, Asier Eiguren, Aitor Bergara +2
We discuss how to construct tight-binding models for ultra cold atoms in honeycomb potentials, by means of the maximally localized Wannier functions (MLWFs) for composite bands int…
Phase-tunable colossal magneto-heat resistance in ferromagnetic Josephson thermal valves
F. Giazotto, F. S. Bergeret
We propose a heat valve based on the interplay between thermal transport and proximity-induced exchange splitting in Josephson tunnel junctions. We demonstrate that the junction he…
Universal Dynamical Steps in the Exact Time-Dependent Exchange-Correlation Potential
Peter Elliott, Johanna I. Fuks, Angel Rubio +1
We show that the exact exchange-correlation potential of time-dependent density-functional theory displays dynamical step structures that have a spatially non-local and time non-lo…
Singlet-triplet conversion and the long-range proximity effect in superconductor-ferromagnet structures with generic spin dependent fields
F. S. Bergeret, I. Tokatly
The long-range proximity effect in superconductor/ferromagnet (S/F) hybrid nano-structures is observed if singlet Cooper pairs from the superconductor are converted into triplet pa…
Fundamentals of Time-Resolved Charge-Transfer in Time-Dependent Density Functional Theory
Johanna I. Fuks, Peter Elliott, Angel Rubio +1
We show that as an electron transfers between closed-shell molecular fragments at large separation, the exact correlation potential of time-dependent density functional theory grad…