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8 papers · 2 filters
Dispersive nodal fermions along grain boundaries in Floquet topological crystals
Daniel J. Salib, Bitan Roy
Driven quantum materials often feature emergent topology, otherwise absent in static crystals. Dynamic bulk-boundary correspondence, encoded by nondissipative gapless modes residin…
Transport in strained graphene: Interplay of Abelian and axial magnetic fields
Aqeel Ahmed, Sanjib Kumar Das, Bitan Roy
Immersed in external magnetic fields (), buckled graphene constitutes an ideal tabletop setup, manifesting a confluence of time-reversal symmetry () breaking Abeli…
Topologically distinct atomic insulators
Sanjib Kumar Das, Sourav Manna, Bitan Roy
Topological classification of quantum solids often (if not always) groups all trivial atomic or normal insulators (NIs) into the same featureless family. As we argue here, this is…
Dynamic melting and condensation of topological dislocation modes
Sanjib Kumar Das, Bitan Roy
Bulk dislocation lattice defects are instrumental in identifying translationally active topological insulators (TATIs), featuring band inversion at a finite momentum (${\bf K}_{\rm…
Nodal pair density waves from a quarter-metal in crystalline graphene multilayers
Sk Asrap Murshed, Bitan Roy
Crystalline graphene heterostructures, namely, Bernal bilayer graphene (BBLG) and rhombohedral trilayer graphene (RTLG), for example, subject to perpendicular electric displacement…
Third-order Hall effect in the surface states of a topological insulator
Tanay Nag, Sanjib Kumar Das, Chuanchang Zeng +1
Time reversal and inversion symmetric materials fail to yield linear and nonlinear responses since they possess net zero Berry curvature. However, higher-order Hall response can be…