4 papers
Network model for higher-order topological phases
Hui Liu, Selma Franca, Ali G. Moghaddam +2
We introduce a two-dimensional network model that realizes a higher-order topological phase (HOTP). We find that in the HOTP the bulk and boundaries of the system are gapped, and a…
Phase tunable second-order topological superconductor
S. Franca, D. V. Efremov, I. C. Fulga
Two-dimensional second-order topological superconductors (SOTSCs) have gapped bulk and edge states, with zero-energy Majorana bound states localized at corners. Motivated by recent…
Majorana fermions in finite-size strips in the presence of orbital effects: what is the Majorana polarization telling us?
Selma Franca, Vardan Kaladzhyan, Cristina Bena
We study numerically the formation of Majorana bound states in a finite-size quasi-one-dimensional square-lattice strip with Rashba spin-orbit coupling, in the presence of a proxim…
An anomalous higher-order topological insulator
S. Franca, J. van den Brink, I. C. Fulga
Topological multipole insulators are a class of higher order topological insulators (HOTI) in which robust fractional corner charges appear due to a quantized electric multipole mo…