2 papers
cond-mat.str-el2026
Phase transitions through excited-state level crossings and topological indicators: the case of the XXZ chain with staggered Ising interaction
B. F. Márquez, B. F. Márquez, K. Hallberg +1
We combine two ways of determining the phase diagram of the spin- XXZ chain with a staggered Ising interaction and uniform transverse exchange, based on exact diagonalization.…
cond-mat.str-el2025
Tunneling spectroscopy of the spinon-Kondo effect in one-dimensional Mott insulators
Rodrigo G. Pereira, Bruno F. Marquez, Karen Hallberg +2
We study the tunneling density of states (TDOS) in one-dimensional Mott insulators at energies below the charge gap. By employing nonlinear Luttinger liquid theory and density-matr…