My research articles are listed below. For more updated and current research work, please visit arxiv, Google scholar, and my Researchgate profile.
1. Multi-Orbital Quantum Antiferromagnetism in Iron Pnictides — Effective Spin Couplings and Quantum Corrections to Sublattice Magnetization
S. Ghosh, N. Raghuvanshi, S. Mohapatra, A. Kumar, and A. Singh
J. Phys.: Condens. Matter 28, 366002 (2016).
2. Spin Waves in the AF State of the t − t ′ Hubbard Model on the FCC Lattice: Competing Interactions, Frustration, and Instabilities
A. Singh, S. Mohapatra, T. Ziman, and T. Chatterji
J. Appl. Phys. 121, 073903 (2017).
3. Magnetic Excitations in a Three-Orbital Model for the Strongly Spin-Orbit Coupled Iridates: Effect of Mixing between the J = 1/2 and 3/2 Sectors
S. Mohapatra, J. van den Brink, and A. Singh
Phys. Rev. B 95, 094435 (2017).
4. Effects of the Structural Distortion on the Electronic Band Structure of NaOsO3 Studied Within Density Functional Theory and a Three-Orbital Model
S. Mohapatra, C. Bhandari, S. Satpathy, and A. Singh
Phys. Rev. B 97 155154 (2018).
5. Spin-Orbit Coupling Induced Magnetic Anisotropy and Large Spin Wave Gap in NaOsO3
A. Singh, S. Mohapatra, C. Bhandari, and S. Satpathy
J. Phys. Commun. 2 115016 (2018).
6. Spin Waves and Stability of Zigzag Order in the Hubbard Model with Spin-Dependent Hopping Terms - Application to the Honeycomb Lattice Compounds Na2IrO3 and α − RuCl3
S. Mohapatra and A. Singh
J. Magn. Magn. Mater 479, 229 (2019).
7. Octahedral Tilting Induced Isospin Reorientation Transition in Iridate Heterostructures
S. Mohapatra, S. Aditya, R. Mukherjee, and A. Singh
Phys. Rev. B: Rapid Communications 100, 140409(R) (2019).
8. Correlated Motion of Particle-Hole Excitations Across the Renormalized Spin–Orbit Gap in Sr2IrO4
S. Mohapatra and A. Singh
J. Magn. Magn. Mater 512, 166997 (2020).
9. Magnetic Reorientation Transition in a Three Orbital Model for Ca2RuO4 —Interplay of Spin–Orbit Coupling, Tetragonal Distortion, and Coulomb Interactions
S. Mohapatra and A. Singh,
J. Phys.: Condens. Matter 32, 485805 (2020).
10. Pseudo-Spin Rotation Symmetry Breaking by Coulomb In-teraction Terms in Spin-Orbit Coupled Systems
S. Mohapatra and A. Singh
J. Phys.: Condens. Matter 33, 065802 (2021).
11. Role of Orbital Off-Diagonal Spin and Charge Condensates in a Three Orbital Model for Ca2RuO4 —Coulomb Renormalized Spin–Orbit Coupling, Orbital Moment, and Tunable Magnetic Order
S. Mohapatra, R. Kundu, A. Dubey, D. Dutta, and A. Singh
J. Magn. Magn. Mater 537, 168172 (2021).
12. Coupled spin-orbital fluctuations in a three orbital model for 4d and 5d oxides with electron fillings n = 3, 4, 5 — Application to NaOsO3, Ca2RuO4, and Sr2IrO4
S. Mohapatra and A. Singh
J. Phys.: Condens. Matter 33, 345803 (2021).
Preprints
13. Magnetic Order and Anisotropic Interactions Induced by Mixing Between the J = 1/2 and 3/2 Sectors in Spin-Orbit Coupled Honeycomb-Lattice Compounds
S. Mohapatra and A. Singh
arXiv:1908.09130 (2019). (to be submitted)
14. Spin-Orbit Coupling Induced Staggered-to-Entangled Orbital Order Transition in a Three-Orbital Model for Sr2CuO4
S. Mohapatra, D. K. Singh, and A. Singh
arXiv:2107.07214 (2021). (under review)
15. Orbital entangled antiferromagnetoc order and spin-orbit-distortion exciton in Sr2VO4
S. Mohapatra, D. K. Singh, R. Ray, S. Ghosh, and A. Singh
arXiv:2202.11971 (2022). (to be submitted)
PhD Thesis
"Three-orbital-model investigation of electronic structure, magnetic excitations, and anisotropy effects in strongly spin-orbit coupled iridates and osmates"