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papers

Publications (7)

cond-mat.str-el2024

Electronic and magnetic ground state of 4 $d^{3}$ double perovskite ruthenates A $_{2}$ LaRuO $_{6}$ (A $=$ Ca, Sr, Ba)

Asha Ann Abraham, Roumita Roy, Ruta Kulkarni +2

4 $d$ transition metal oxide (TMO) offers an intriguing puzzle for their electronic and magnetic ground state. They are in the cross-over regime of strong spin orbit interaction (SO…

cond-mat.mtrl-sci2025

Occurrence of chemically tuned spin-texture controlled large intrinsic anomalous Hall effect in epitaxial $M n_{3 + x} P t_{1 - x}$ thin Films

Indraneel Sinha, Saurav Sachin, Shreyashi Sinha +3

Achieving atomically flat and stoichiometric films of chiral antiferromagnets (AFM) with two-dimensional kagome spin lattice structures are crucial for integrating these materials…

cond-mat.str-el2024

$J_{e f f}$ states in a quasi one dimensional antiferromagnetic spin chain hexagonal Iridates Sr $_{3}$ MIrO $_{6}$ (M=Mg, Zn, Cd): an $ab - ini t i o$ comparative perspective

Roumita Roy, Sudipta Kanungo

We employ first-principles density-functional theory, to perform a comparative investigation of the effect of the spin-orbit coupling (SOC) on the electronic and magnetic propertie…

cond-mat.mtrl-sci2025

Atypical Ferrimagnetism in Ni $_{4}$ Nb $_{2}$ O $_{9}$

Jhuma Sannigrahi, Roumita Roy, Richard Waite +6

Ferrimagnetism typically emerges from chemically distinct magnetic ions or the same element at two inequivalent crystallographic sites, rendering unequal moments. In contrast, Ni4N…

cond-mat.mtrl-sci2022

Extrinsic to intrinsic mechanism crossover of anomalous Hall effect in the Ir-doped MnPtSn Heusler system

Sk Jamaluddin, Roumita Roy, Amitabh Das +2

Recent findings of large anomalous Hall signal in nonferromagnetic and nonferrimagnetic materials suggest that the magnetization of the system is not a critical component for the r…

cond-mat.str-el2020

Structure, magnetism and electronic properties in 3 $d$ -5 $d$ based double perovskite (Sr $_{1 - x}$ Ca $_{x}$ ) $_{2}$ FeIrO $_{6}$ (0 $\leq$ $x$ $\leq$ 1): A combined experimental and theoretical investigation

K. C. Kharkwal, Roumita Roy, Harish Kumar +6

The 3 $d$ -5 $d$ based double perovskites offer an ideal playground to study the interplay between electron correlation ( $U$ ) and spin-orbit coupling (SOC) effect, showing exotic phys…

Publications (7)

Electronic and magnetic ground state of 4d3 double perovskite ruthenates A2​LaRuO6​ (A = Ca, Sr, Ba)

Occurrence of chemically tuned spin-texture controlled large intrinsic anomalous Hall effect in epitaxial Mn3+x​Pt1−x​ thin Films

Jeff​ states in a quasi one dimensional antiferromagnetic spin chain hexagonal Iridates Sr3​MIrO6​ (M=Mg, Zn, Cd): an ab−initio comparative perspective