Topological inheritance in two-component Hubbard models with single-component Su-Schrieffer-Heeger dimerization

The interplay between interparticle interactions and topological features may result in unusual phenomena. Interestingly, interactions may induce topological features in an originally trivial system, as we illustrate for the case of a one-dimensional two-component Hubbard model in which one component is subjected to SuSchrieffer-Heeger dimerization, whereas the other one is not. We show that due to intercomponent interactions the topological properties of one component are induced in the originally trivial one. Although for large interactions topological inheritance may be readily explained by on-site pairing, we show that the threshold for full inheritance occurs at weak interactions, for which the components are not yet paired. We illustrate this inheritance by discussing both bulk and edge properties, as well as dynamical observables as mean chiral displacement and charge pumping.

Automated summary

The interplay between interparticle interactions and topological features may lead to unusual phenomena, as demonstrated in a one-dimensional two-component Hubbard model. Topological properties of one component can be induced in a trivial component due to intercomponent interactions, with the threshold for full inheritance occurring at weak interactions. This inheritance is illustrated through discussions on bulk and edge properties, as well as dynamical observables like mean chiral displacement and charge pumping.