Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-10-13
Phys. Rev. B 85, 155124 (2012)
Physics
Condensed Matter
Strongly Correlated Electrons
6 pages, 6 figures
Scientific paper
10.1103/PhysRevB.85.155124
We study the time evolution of the Hubbard model driven by a half-cycle or monocycle pulsed electric field F(t) using the nonequilibrium dynamical mean-field theory. We find that for properly chosen pulse shapes the electron-electron interaction can be effectively and permanently switched from repulsive to attractive if there is no energy dissipation. The physics behind the interaction conversion is a nonadiabatic shift $\delta$ of the population in momentum space. When $\delta\sim\pi$, the shifted population relaxes to a negative-temperature state, which leads to the interaction switching. Due to electron correlation effects $\delta$ deviates from the dynamical phase $\phi=\int dt F(t)$, which enables the seemingly counterintuitive repulsion-to-attraction transition by a monocycle pulse with $\phi=0$.
Aoki Hideo
Oka Takashi
Tsuji Naoto
Werner Philipp
No associations
LandOfFree
Repulsion-to-attraction transition in correlated electron systems triggered by a monocycle pulse does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Repulsion-to-attraction transition in correlated electron systems triggered by a monocycle pulse, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Repulsion-to-attraction transition in correlated electron systems triggered by a monocycle pulse will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-500247