15 citations · 34 across the 13 of their papers we have counts for
13 papers
Dirac fermions in non-Hermitian magnetic fields: Zero modes and index theorem
Christopher A. Leong, Bitan Roy
In a Lorentz symmetric non-Hermitian (NH) Dirac theory, containing the canonical relativistic Hamiltonian accompanied by a masslike anti-Hermitian Dirac operator, when the associat…
Hidden-ordered Dirac fermions
Bitan Roy
I propose a Hermitian extension of the Lorentz-symmetric Dirac theory by complementing the associated Hamiltonian with another \emph{masslike} anticommuting Dirac operator. The res…
Anisotropic marginal Fermi liquid for Coulomb interacting generalized Weyl fermions
Gabriel Malavé, Rodrigo Soto-Garrido, Bitan Roy +1
Owing to the power-law anisotropy in the quasiparticle dispersion, yielding an enhanced density of states, the effects of long range Coulomb interaction get amplified in three-dime…
Pair density wave in quarter metals from a repulsive fermionic interaction in graphene heterostructures: A renormalization group study
Sk Asrap Murshed, Bitan Roy
Electronic bands in chirally stacked layer carbon-based honeycomb heterostructures, encompassing rhombohedral or ABC (), Bernal or AB bilayer (), and monolayer (…
Global phase diagram of two-dimensional dirty hyperbolic Dirac liquids
Christopher A. Leong, Daniel J. Salib, Bitan Roy
Within the framework of the canonical nearest-neighbor tight-binding model for spinless fermions, a family of two-dimensional bipartite hyperbolic lattices hosts massless Diraclike…
Strained hyperbolic Dirac fermions: Zero modes, flat bands, and competing orders
Christopher A. Leong, Bitan Roy
Starting from the nearest-neighbor tight-binding model on {10,3} and {14,3} hyperbolic lattices that, for a uniform hopping amplitude, gives rise to emergent Dirac fermions on a cu…
Amplified magnetic catalysis in non-Hermitian Euclidean and hyperbolic Dirac liquids
Christopher A. Leong, Bitan Roy
Due to their iconic linearly vanishing density of states near the zero-energy, half-filled two-dimensional Dirac materials in flat Euclidean and negatively-curved hyperbolic spaces…
Charge density waves and stripes in quarter metals of graphene heterostructures
Sk Asrap Murshed, Bitan Roy
Motivated by recent experiments, here we identify valley-coherent charge density wave (VC-CDW) in the nondegenerate quarter metal for the entire family of chirally-stacked laye…
Zero modes and index theorems for non-Hermitian Dirac fermions
Bitan Roy
Dirac fermions, subject to external magnetic fields and in the presence of mass orders that assume topologically nontrivial spatial textures such as domain wall and vortices, for e…
Non-Hermitian catalysis of spontaneous symmetry breaking on Euclidean and hyperbolic lattices
Christopher A. Leong, Bitan Roy
Depending on the lattice geometry, the nearest-neighbor (NN) tight-binding model for free fermions gives rise to particle-hole symmetric emergent Dirac liquid, Fermi liquid, and fl…
Yukawa-Lorentz symmetry of interacting non-Hermitian birefringent Dirac fermions
Sk Asrap Murshed, Bitan Roy
The energy spectra of linearly dispersing gapless spin-3/2 Dirac fermions display birefringence, featuring two effective Fermi velocities, thus breaking the space-time Lorentz symm…
Quantum Electrodynamics of Non-Hermitian Dirac Fermions
Sk Asrap Murshed, Bitan Roy
We develop an effective quantum electrodynamics for non-Hermitian (NH) Dirac materials interacting with photons. These systems are described by nonspatial symmetry protected Lorent…
Magnetic catalysis in weakly interacting hyperbolic Dirac materials
Bitan Roy
Due to the linearly vanishing density of states, emergent massless Dirac quasiparticles resulting from the free fermion motion in a family of two-dimensional half-filled bipartite…