104 citations · 206 across the 13 of their papers we have counts for
13 papers
Non-Bloch band theory of boundary-controlled magnon edge modes in an antiferromagnetic chain
Suman Debnath, Sonu Verma, Rohit Mukherjee +1
We define a winding number within the Non-Bloch band theory framework that captures the emergence of magnon edge modes in a one-dimensional antiferromagnetic spin chain, even when…
Bulk-boundary correspondence in extended trimer Su-Schrieffer-Heeger model
Sonu Verma, Tarun Kanti Ghosh
We consider an extended trimer Su-Schrieffer-Heeger (SSH) tight-binding Hamiltonian keeping up to next-nearest-neighbor (NNN) hopping terms and on-site potential energy. The Bloch…
Topological Phase Transitions of Generalized Brillouin Zone
Sonu Verma, Moon Jip Park
It has been known that the bulk-boundary correspondence (BBC) of the non-Hermitian skin effect is characterized by the topology of the complex eigenvalue spectra, while the topolog…
Non-linear magnon transport in a bilayer van der Waals antiferromagnets
Rohit Mukherjee, Sonu Verma, Arijit Kundu
In this paper, we study the Berry curvature induced linear and nonlinear magnon transport in bilayer van der Waals antiferromagnets, where we deduce forms for the spin and energy c…
Charge density wave and Weyl Semimetal phase in YIrO
Abhishek Juyal, Vinod Kumar Dwivedi, Sonu Verma +3
The subtle interplay of band topology and symmetry broken phase, induced by electron correlations, has immense contemporary relevance and potentially offers novel physical insights…
Dipolar optical plasmon in thin-film Weyl semimetals
Debasmita Giri, Dibya Kanti Mukherjee, Sonu Verma +2
In a slab geometry with large surface-to-bulk ratio, topological surface states such as Fermi arcs for Weyl or Dirac semimetals may dominate their low-energy properties. We investi…
Dynamical polarization and plasmons in noncentrosymmetric metals
Sonu Verma, Arijit Kundu, Tarun Kanti Ghosh
We study the dynamical polarization function and plasmon modes for spin-orbit coupled noncentrosymmetric metals (NCMs). These systems have different Fermi surface topology for Ferm…
RKKY coupling in Weyl semimetal thin films
Sonu Verma, Debasmita Giri, H. A. Fertig +1
We consider the effective coupling between impurity spins on surfaces of a thin-film Weyl semimetal within Ruderman-Kittel-Kasuya-Yoshida (RKKY) theory. If the spins are on the sam…
Thermoelectric and optical probes for a Fermi surface topology change in noncentrosymmetric metals
Sonu Verma, Tutul Biswas, Tarun Kanti Ghosh
Noncentrosymmetric metals such as Li(PdPt)B have different Fermi surface topology below and above the band touching point where spin-degeneracy is not lifted by…
RKKY interaction in Mn-doped 4 4 Luttinger systems
Sonu Verma, Arijit Kundu, Tarun Kanti Ghosh
We consider Mn-doped bulk zinc-blende semiconductors described by the 4 4 Luttinger Hamiltonian. In these semiconductors, Mn atom acts as an acceptor providing the system…
Non-local control of spin-spin correlation in finite geometry helical edge
Sonu Verma, Arijit Kundu
An infinite edge of a quantum Hall system prohibits indirect exchange coupling between two spins whereas a quantum spin-Hall edge prohibits out-of-plane coupling. In this study we…
Effect of electron-hole asymmetry on optical conductivity in 8-Pmmn borophene
Sonu Verma, Alestin Mawrie, Tarun Kanti Ghosh
We present a detail theoretical study of the Drude weight and optical conductivity of 8- borophene having tilted anisotropic Dirac cones. We provide exact analytical expressi…
Electrical and thermoelectric transport properties of two-dimensional fermionic systems with -cubic spin-orbit coupling
Alestin Mawrie, Sonu Verma, Tarun Kanti Ghosh
We investigate the effect of -cubic spin-orbit interaction on electrical and thermoelectric transport properties of two-dimensional fermionic systems. We obtain exact analytical…