79 citations · 782 across the 30 of their papers we have counts for
30 papers
Flat Bands in Three-dimensional Lattice Models with Non-trivial Hopf Index
Ivan Dutta, Kush Saha
We report the presence of exactly and nearly flat bands with non-trivial topology in three-dimensional (3D) lattice models. We first show that an exactly flat band can be realized…
Vector Chirality Driven Topological Phase Transition and the Associated Anomalous Hall Conductivity Tuning in a Non-Collinear Antiferromagnet
Subhadip Pradhan, Kartik Samanta, Kush Saha +1
Based on the first-principles electronic structure calculations and subsequent symmetry adapted effective low-energy theory, we show the switching of the vector chir…
Non-linear response of interacting bosons in a quasiperiodic potential
Debamalya Dutta, Arko Roy, Kush Saha
We theoretically study the electric pulse-driven non-linear response of interacting bosons loaded in an optical lattice in the presence of an incommensurate superlattice potential.…
Hinge mode dynamics of periodically driven higher-order Weyl semimetals
Somsubhra Ghosh, Kush Saha, K. Sengupta
We study the stroboscopic dynamics of hinge modes of a second-order topological material modeled by a tight-binding free fermion Hamiltonian on a cubic lattice in the intermediate…
Anomalous pumping in the non-Hermitian Rice-Mele model
Abhishek Kumar, Sarbajit Mazumdar, S D Mahanti +1
We study topological charge pumping (TCP) in the Rice-Mele (RM) model with irreciprocal hopping. The non-Hermiticity gives rise to interesting pumping physics, owing to the presenc…
Non-linear transport without spin-orbit coupling or warping in two-dimensional Dirac semimetals
Sai Satyam Samal, S. Nandy, Kush Saha
It has recently been realized that the first-order moment of the Berry curvature, namely the Berry curvature dipole (BCD) can give rise to non-linear current in a wide variety of t…