16 citations · 25 across the 7 of their papers we have counts for
7 papers
Altermagnetism from the viewpoint of chemistry
Nayana Devaraj, Anumita Bose, Md Afsar Reja +2
Magnetism has been a central theme of research in chemistry, physics, and materials science, with chemical composition and bonding playing key roles in determining magnetic behavio…
The Bott Metric: A Real-Space Bridge Between Topology and Quantum Metric
Kaustav Chatterjee, Ronika Sarkar, Md Afsar Reja +1
The Bott index has become an indispensable tool to probe the topology of quantum matter, particularly in systems lacking translational symmetry. Constructed from a plaquette operat…
Hexagonal Warping Control of Exceptional Points in Topological Insulator--Ferromagnetic Heterojunctions
Md Afsar Reja, Awadhesh Narayan
Exceptional points (EPs) are non-Hermitian degeneracies, where both eigenvalues and eigenvectors coalesce, which are fundamentally distinct from their Hermitian counterparts. In th…
Field-Tunable Quantum Metric in Few-Layer Phosphorene
Md Afsar Reja, Arka Bandyopadhyay, Awadhesh Narayan
The quantum metric -- which quantifies the distance between quantum states -- is a fundamental component of the quantum geometric tensor, playing a crucial role in a wide range of…
Unlocking Doping Effects on Altermagnetism in MnTe: Emergence of Quasi-altermagnetism
Nayana Devaraj, Anumita Bose, Arindom Das +4
Governed by specific symmetries, altermagnetism is an emerging field in condensed matter physics, characterized by unique spin-splitting of the bands in the momentum space co-exist…
Néel vector controlled exceptional contours in -wave magnet-ferromagnet junctions
Md Afsar Reja, Awadhesh Narayan
Non-Hermitian systems can host exceptional degeneracies where not only the eigenvalues, but also the corresponding eigenvectors coalesce. Recently, -wave magnets have been intro…
Emergence of tunable exceptional points in altermagnet-ferromagnet junctions
Md Afsar Reja, Awadhesh Narayan
The existence of exceptional points (EPs) where both eigenvalues and eigenvectors converge is a key characteristic of non-Hermitian physics. A newly-discovered class of…