Phase diagram and topology of the XXZ chain with alternating bonds and staggered magnetic field

B. F. Márquez, N. Aucar Boidi, K. Hallberg +1

The XXZ spin-half chain has Heisenberg exchange interactions $J_z$ ($J_{\perp }$) in the $z$ ($x,y$) direction. The model has a transition from the spin-fluid phase for $-J_\perp < J_…