10 research outputs found
Floquet engineering of the Lifshitz phase transition in the Hubbard model
Within the Floquet theory of periodically driven quantum systems, we
demonstrate that an off-resonant high-frequency electromagnetic field can
induce the Lifshitz phase transition in periodical structures described by the
one-dimensional repulsive Hubbard model with the nearest and next-nearest
neighbor hopping. The transition changes the topology of electron energy
spectrum at the Fermi level, transforming it from the two Fermi-points to the
four Fermi-points, what facilitates the emergence of the superconducting
fluctuations in the structure. Possible manifestations of the effect and
conditions of its experimental observability are discussed