4 papers
Non-magnetic floating phases in frustrated Haldane chains with a single-ion anisotropy
Bowy M. La Riviere, Natalia Chepiga
We investigate the effect of a single-ion anisotropy on the bilinear-biquadratic spin-1 J1-J2 chain, focusing on the quantum phase transitions out of the trimerized phase. Using la…
Exact zero modes in interacting Majorana X- and Y-junctions
Bowy M. La Rivière, Rik Mulder, Natalia Chepiga
We report the emergence of exact zero modes in junctions of two, three and four short interacting Majorana wires, equivalent to a chain with an impurity bond, Y- and X- junctions r…
Extended Ashkin-Teller transition in two coupled frustrated Haldane chains
Bowy M. La Rivière, Natalia Chepiga
We report an extremely rich ground state phase diagram of two spin-1 Haldane chains frustrated with a three-site exchange and coupled by the antiferromagnetic Heisenberg interactio…
Deconfined quantum criticality in a frustrated Haldane chain with single-ion anisotropy
Niels T. Pronk, Bowy M. La Rivière, Natalia Chepiga
We report a phase diagram of the antiferromagnetic spin-1 chain with nearest-neighbor Heisenberg and three-site interactions in the presence of single-ion anisotropy. We show that…