5 papers
Leveraging structural disorder to enhance topological phases
Laura Gomez Paz, Peru d'Ornellas, Adolfo G Grushin
On-site disorder can be leveraged to induce a transition from a trivial to a topological insulator. However it is unclear if structural disorder in the absence of on-site disorder…
Topologically Protected Surface Altermagnetism on Antiferromagnets
Valentin Leeb, Peru d'Ornellas, Fernando de Juan +1
Altermagnetism (AM) and its associated spin-transport phenomena are typically linked to spin-split electronic band structures in bulk materials. However, the crystal surface has a…
Altermagnetism Without Crystal Symmetry
Peru d'Ornellas, Valentin Leeb, Adolfo G. Grushin +1
Altermagnetism is a collinear magnetic order in which opposite spin species are exchanged under a real-space rotation. Hence, the search for physical realizations has focussed on c…
Fractonic Fractional Quantum Hall Effect
Justin Schirmann, Peru d'Ornellas, Charles Stahl +1
In non-interacting systems, disorder can drive a trivial phase into a topological one. However little is known how to construct a fractional quantum Hall ground-state, a paradigmat…
Kitaev-Heisenberg model on the star lattice: From chiral Majorana fermions to chiral triplons
Peru d'Ornellas, Johannes Knolle
The interplay of frustrated interactions and lattice geometry can lead to a variety of exotic quantum phases. Here we unearth a particularly rich phase diagram of the Kitaev-Heisen…