155 citations · 1.1k across the 43 of their papers we have counts for
46 papers
Estimation of multiple precision matrices under shared support with heterogeneous edge strengths
Sayan Ranjan Bhowal, Debashis Paul, Gopal K Basak +1
Estimating multiple precision matrices in high-dimension presents significant challenges, particularly when distinct datasets share a common conditional dependency structure but ex…
Room-Temperature Electric-Field Control of Anomalous Hall Effect in Py/BTO/LSMO Heterostructures
Kusampal Yadav, Kousik Das, Aditya Raj +7
We demonstrate room temperature electric field control of the anomalous Hall effect in epitaxial Ni80Fe20 (Py) BaTiO3 (BTO) La0.7Sr0.3MnO3 (LSMO) thin film heterostructures grown o…
Interface engineering of the anomalous Hall effect in Ni-based heterostructures
Mainak Ghosh, Kusampal Yadav, Kalyan sarkar +3
Using a combined experimental and first-principles theoretical approach, we demonstrate interface engineering of the anomalous Hall effect in Ni-based epitaxial thin-film heterostr…
Orbital and Spin Nernst Effects in Monolayers of Transition Metal Dichalcogenides
Saikat Saha, Arnab Bose, Sayantika Bhowal
In recent years, orbitronic effects have attracted growing attention as complementary counterparts to the well-established spintronic phenomena. In this work, we demonstrate that m…
Interplay of Valley, Orbital, Spin, and Layer Degrees of Freedom in TaCS MXene
Kunal Dutta, Anupam Mondal, Sayantika Bhowal +2
We show that the MXene TaCS provides an excellent platform for hosting multiple coupled degrees of freedom, viz., valley, spin, orbital, and layer. The interplay among thes…
Why is the -Wave spin splitting in CuF bulk-like?
Muskan, Subhadeep Bandyopadhyay, Sayantika Bhowal
With the advent of nonrelativistic spin splitting in collinear compensated antiferromagnets, several candidate materials have also been proposed, among which the family of transiti…
Non-relativistic spin splitting: Features and Functionalities
Sayantika Bhowal, Arnab Bose
Recently, spin splitting of non-relativistic origin in compensated antiferromagnets has drawn growing attention in condensed matter research. Although many materials, now known to…
Statistical inference using debiased group graphical lasso for multiple sparse precision matrices
Sayan Ranjan Bhowal, Debashis Paul, Gopal K Basak +1
Debiasing group graphical lasso estimates enables statistical inference when multiple Gaussian graphical models share a common sparsity pattern. We analyze the estimation propertie…
A Universal Framework for Controlling Non-Relativistic Spin Splitting
Aniruddha Ray, Subhadeep Bandyopadhyay, Sayantika Bhowal
Non-relativistic spin splitting in antiferromagnets has recently attracted considerable attention. Here we present a universal framework for controlling such spin splitting by iden…
Designing Non-Relativistic Spin Splitting in Oxide Perovskites
Subhadeep Bandyopadhyay, Silvia Picozzi, Sayantika Bhowal
We investigate the role of atomic distortions in non-relativistic spin splitting in perovskite oxides with Pbnm symmetry. Using LaMnO3 as a representative material, we analyze its…
Giant topological Hall effect in epitaxial NiFe/LaSrMnO thin film heterostructures
Kusampal Yadav, Dilruba Hasina, Nasiruddin Mondal +2
The emergence of new physical properties at the interfaces between complex oxides has always been of both fundamental and practical importance. Here, we report the observation of a…
Rational Control of Magnonic and Electronic Band Splittings
Subhadeep Bandyopadhyay, Anoop Raj, Philippe Ghosez +2
We provide a theoretical demonstration of controllable non-relativistic spin splitting in both electronic and magnonic bands via targeted structural distortions tied to specific ph…
Emergent surface multiferroicity
Sayantika Bhowal, Andrea Urru, Sophie F. Weber +1
We show that the surface of a centrosymmetric, collinear, compensated antiferromagnet, which hosts bulk ferroically ordered magnetic octupoles, exhibits a linear magnetoelectric ef…
Electric toroidal dipole order and hidden spin polarization in ferroaxial materials
Sayantika Bhowal, Nicola A. Spaldin
We investigate the role of electric toroidal dipoles in the prototypical ferroaxial materials NiTiO and KZr(PO), which undergo ferroaxial structural phase transitio…
Non-relativistic ferromagnetotriakontadipolar order and spin splitting in hematite
X. H. Verbeek, D. Voderholzer, S. Schären +3
We show that hematite, -FeO, below its Morin transition, has a ferroic ordering of rank-5 magnetic triakontadipoles on the Fe ions. In the absence of spin-orbit coupling…
GdAlSi: An antiferromagnetic topological Weyl semimetal with non-relativistic spin splitting
Jadupati Nag, Bishal Das, Sayantika Bhowal +9
Spintronics has emerged as a viable alternative to traditional electronics based technologies in the past few decades. While on one hand, the discovery of topological phases of mat…
Universal responses in nonmagnetic polar metals
Fabian Jäger, Nicola A. Spaldin, Sayantika Bhowal
We demonstrate that two phenomena, the kinetic magneto-electric effect and the non-linear Hall effect, are universal to polar metals, as a consequence of their coexisting and contr…
Surface Magnetization in Antiferromagnets: Classification, example materials, and relation to magnetoelectric responses
Sophie F. Weber, Andrea Urru, Sayantika Bhowal +2
We use symmetry analysis and density functional theory to characterize antiferromagnetic (AFM) materials which have a finite equilibrium magnetization density on particular surface…
Magnetic octupoles as the order parameter for unconventional antiferromagnetism
Sayantika Bhowal, Nicola A. Spaldin
We show that time-reversal symmetry broken, centrosymmetric antiferromagnets with nonrelativistic spin-splitting are conveniently described in terms of the ferroic ordering of magn…
Polar metals: Principles and Prospects
Sayantika Bhowal, Nicola A. Spaldin
We review the class of materials known as polar metals, in which polarity and metallicity coexist in the same phase. While the notion of polar metals was first invoked more than 50…
The interplay between structural, magnetic and electronic states in the pyrochlore iridate Eu2Ir2O7
Manjil Das, Sayantika Bhowal, Jhuma Sannigrahi +8
We address the concomitant metal-insulator transition (MIT) and antiferromagnetic ordering in the novel pyrochlore iridate Eu2Ir2O7 by combining x-ray absorption spectroscopy, x-ra…
Magnetoelectric classification of skyrmions
Sayantika Bhowal, Nicola A. Spaldin
We develop a general theory to classify magnetic skyrmions and related spin textures in terms of their magnetoelectric multipoles. Since magnetic skyrmions are now established in i…
Orbital Hall effect in bilayer transition metal dichalcogenides: From the intra-atomic approximation to the Bloch states orbital magnetic moment approach
Tarik P. Cysne, Sayantika Bhowal, Giovanni Vignale +1
Using an effective Dirac model, we study the orbital Hall effect (OHE) in bilayers of transition metal dichalcogenides with 2H stacking (2H-TMD). We use first-order perturbation th…
SrLiIrO: a potential quantum spin liquid candidate in the one dimensional iridate family
Abhisek Bandyopadhyay, A. Chakraborty, S. Bhowal +8
Spin-orbit coupling (SOC) offers a large variety of novel and extraordinary magnetic and electronic properties in otherwise `ordinary pool' of heavy ion oxides. Here we present a d…