2 papers
cond-mat.stat-mech2018
Non-ergodic states induced by impurity levels in quantum spin chains
A. O. García Rodríguez, G. G. Cabrera
The semi-infinite XY spin chain with an impurity at the boundary has been chosen as a prototype of interacting many-body systems to test for non-ergodic behavior. The model is exac…
cond-mat.mtrl-sci2003
Domain-wall profile in the presence of anisotropic exchange interactions: Effective on-site anisotropy
A. O. Garcia Rodriguez, A. Villares Ferrer, A. O. Caldeira
Starting from a D-dimensional XXZ ferromagnetic Heisenberg model in an hypercubic lattice, it is demonstrated that the anisotropy in the exchange coupling constant leads to a D-dep…