17 papers
Genus-protected higher-order topological phases
Shahroze Shahab, Hui Liu, Daniel Varjas +1
Higher-order topological phases (HOTPs) feature protected gapless modes on boundaries of higher codimension, such as the corners or hinges of a crystal. They are understood as bein…
Dirac semimetal phases in chiral carbon nanoscrolls
Tzu-Ching Hsu, Jhih-Shih You, Hsiu-Chuan Hsu +1
Chirality induced by rolling a two-dimensional material into a spiral geometry reshapes its electronic band structure. In this work, we theoretically investigate the topological pr…
Generating ferro-spinetic polarizations in altermagnetic insulators
Toshihiro Sato, Mengli Hu, Ion Cosma Fulga +5
Altermagnets are a novel class of fully spin-compensated magnetic materials that nevertheless have spin-split electronic bands, offering novel perspectives for spintronics applicat…
Non-Hermitian topology of quantum spin-Hall systems to detect edge-state polarization
Raghav Chaturvedi, Ion Cosma Fulga, Jeroen van den Brink +1
We study the non-Hermitian topology of multi-terminal transport in a quantum spin-Hall device described by the Bernevig-Hughes-Zhang model. We show that breaking time-reversal symm…
Non-Hermitian topological devices with Chern insulators
Kyrylo Ochkan, Michael Wissmann, Louis Veyrat +9
Multi-terminal topological devices are a new generation of electronic devices with quantized properties robust against imperfections. In magnetic topological insulators, dissipatio…
Electronic structure and hinge states of strained half-Heusler compounds LiSbZn and LiBiZn
Sanjib Kumar Das, Ion Cosma Fulga, Rakshanda Dhawan +3
Half-Heusler compounds are a class of materials with great potential for the study of distinct electronic states. In this work, we investigate, from first-principles, the possibili…