Interacting second-order topological insulators in one-dimensional fermions with correlated hopping
Interacting second-order topological insulators in one-dimensional fermions with correlated hopping
Higher-order topological crystalline phases in low-dimensional interacting quantum systems represent a challenging and largely unexplored research topic. Here, we derive a Hamiltonian describing fermions interacting through correlated hopping processes that break chiral invariance, but preserve both inversion and time-reversal symmetries. In this way, we show that our one-dimensional model gives …