6 papers
Color degeneracy of competing orders near topological defects cores in planar quadratic band touching systems
Bitan Roy
We study two-dimensional fermionic systems, displaying quadratic band touching in the normal state, in the presence of vortices and skyrmions of insulating and superconducting mass…
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…
Hybrid symmetry class topological insulators
Sanjib Kumar Das, Bitan Roy
Traditional topological materials belong to different Altland-Zirnbauer symmetry classes (AZSCs) depending on their non-spatial symmetries. Here we introduce the notion of hybrid s…
Axionic quantum criticality of generalized Weyl semimetals
Gabriel Malave, Rodrigo Soto-Garrido, Vladimir Juricic +1
We formulate a field-theoretic description for -dimensional interacting nodal semimetals, featuring dispersion that scales with the linear and th power of momentum along $d_L…
Dynamic mass generation on two-dimensional electronic hyperbolic lattices
Noble Gluscevich, Abhisek Samanta, Sourav Manna +1
Free electrons hopping on hyperbolic lattices embedded on a negatively curved space can foster (a) Dirac liquids, (b) Fermi liquids, and (c) flat bands, respectively characterized…
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…