Photoinduced Phase Transition in Two-Band model on Penrose Tiling

TL;DR

This paper investigates how photo irradiation induces a dynamic excitonic phase in a two-band Hubbard model on Penrose tiling, revealing site-dependent order and oscillatory behaviors unique to quasiperiodic structures.

Contribution

It demonstrates the photoinduced excitonic transition and characterizes its site-dependent and oscillatory properties in a quasiperiodic lattice, a novel insight into nonequilibrium states.

Findings

Photo irradiation induces a site-dependent excitonic state.

Local oscillatory behavior appears in electron number and order parameters.

The quasiperiodic lattice influences the dynamical properties of the induced phase.

Abstract

We study the effects of the photo irradiation on the band insulating state in the two-band Hubbard model on the Penrose tiling. Examining the time- and site-dependent physical quantities, we find that the excitionic state is dynamically induced with site-dependent order parameters. It is also clarified that, in the excitonic state induced by the photo irradiation, local oscillatory behavior appears in the electron number as well as in the order parameter, which should be characteristic of the quasiperiodic lattice.