3 papers
cond-mat.str-el2021
TSTG I: Single-Particle and Many-Body Hamiltonians and Hidden Non-local Symmetries of Trilayer Moiré Systems with and without Displacement Field
Dumitru Călugăru, Fang Xie, Zhi-Da Song +3
We derive the Hamiltonian for trilayer moiré systems with the Coulomb interaction projected onto the bands near the charge neutrality point. Motivated by the latest experimental re…
cond-mat.mes-hall2018
Generalized Triple-Component Fermions: Lattice Model, Fermi arcs, and Anomalous Transport
Snehasish Nandy, Sourav Manna, Dumitru Calugaru +1
We generalize the construction of time-reversal symmetry-breaking triple-component semimetals, transforming under the pseudospin-1 representation, to arbitrary (anti-)monopole char…
cond-mat.mes-hall2018
Higher Order Topological Phases: A General Principle of Construction
Dumitru Calugaru, Vladimir Juricic, Bitan Roy
We propose a general principle for constructing higher-order topological (HOT) phases. We argue that if a -dimensional first-order or regular topological phase involves Herm…