45 citations · 142 across the 31 of their papers we have counts for
10 papers · 1 filter
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…
Refraction-induced transverse charge transport
Ronika Sarkar, Arka Bandyopadhyay, Awadhesh Narayan +1
We introduce a mechanism that produces a Hall-like transverse response in time-reversal-invariant materials, driven entirely by geometric effects. Specifically, we demonstrate that…
Berry Curvature Dipole-induced Non-linear Hall Effect in Oxide Heterostructures
Nesta Benno Joseph, Arka Bandyopadhyay, Ajit C. Balram +1
The observation of non-linear Hall effects in time-reversal invariant systems has established the intriguing role of band topology beyond Berry curvature in determining transport p…
Characterizing Liouvillian Exceptional Points Through Newton Polygons and Tropical Geometry
Sayooj P, Awadhesh Narayan
The dynamics of open quantum systems described by the Lindblad master equation follows according to non-Hermitian operators. As a result, such systems can host non-Hermitian degene…
Tunable topology, Hall response, and spin-textures in bicircularly polarized light illuminated altermagnets
Maitri Ganguli, Aneek Jana, Awadhesh Narayan
Altermagnets, featuring non-relativistic spin splitting, have drawn enormous attention due to their intriguing properties. Here, we investigate the effects of shining bicircularly…
Extremely Large and Angle-Dependent Magnetoresistance in Kagome Dirac Semimetal RFeSn (R=Ho, Dy)
Susanta Ghosh, Achintya Low, Nayana Devaraj +3
We report on the electronic, magnetic, and magneto-transport properties of Fe-based kagome Dirac system, RFeSn (R = Ho, Dy). Magnetic properties study reveals an antiferrom…
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…
Modulation of Polarization and Metallicity in Janus Sliding Ferroelectrics
Akshay Mahajan, Awadhesh Narayan
Sliding ferroelectricity is emerging as a distinct and promising mechanism for realizing ferroelectricity in low-dimensional systems, offering new design principles beyond the conv…
Chiral damping with persistent edge states: interplay of spectral topology and band topology in open quantum systems
Ronika Sarkar, Suraj S. Hegde, Awadhesh Narayan +1
We study the dynamical consequences of combining the non-Hermitian skin effect with topological edge states. Focusing on the paradigmatic dissipative Hofstadter model, we find that…