- Accepted Paper
Evolution of quasiparticle edge states with Hubbard interaction in Rice-Mele chain
APS Open Sci. - Accepted 28 October, 2026
DOI: https://doi.org/10.1103/p3sh-9gjn
APS Open Sci. - Accepted 28 October, 2026
DOI: https://doi.org/10.1103/p3sh-9gjn
We study the behaviour of edge states in Rice-Mele model with Hubbard interaction, , at half-filling using density matrix renormalization group, exact diagonalization and effective charge dynamics in Kumar representation. By increasing for a fixed dimerization, , and staggered potential, , we find the quasiparticle edge states in the charge gap to come down in energy from in the absence of Hubbard interaction to zero energy at a critical interaction, . This presents an uncommon situation where the competition between and leads to zero-energy edge states, although individually neither nor favours the edge states at zero energy. Upon increasing further, the edge state energy starts increasing again until they are lost in the bulk. However, upon increasing even further, these edge states reappear in the high energy gap. So, with Hubbard interaction, the edge states in Rice-Mele chain transmigrate from the low to high energy charge gap.
If the author has provided any supplemental materials with this article they will be available upon publication of the version of record.