Publications

Books/Book Chapters

Journal Publications 

{2025}

31) Deepu Kumar, J. Khatua, N.The Hoang, Y. Sim, R. K.Ulaganathan, R.Kalaivanan, R. Sankar, Maeng-Je Seong, and Kwang-Yong Choi,  Manipulation of anisotropic Zhang-Rice exciton in van der Waals antiferromagnets NiPS3-xSex by anion substitution, npj 2d materials and applications 2025 (Accepted) 

30) A.G. Chakkar, C. B. Auti, Deepu Kumar, N. Jana, K. Pal, Pradeep Kumar, Raman signature of multiple phase transitions and quasi-particle excitations in putative Kitaev spin liquid candidate Na2Co2TeO6 , Physical Review B 2025 (Accepted).

29) S. Deswal, Deepu Kumar, D. Rout, S. Singh, Pradeep Kumar, Dynamics of electron-electron correlated to electron-phonon coupled phase progression in trilayer nickelate La4Ni3O10, Appl. Phys. Lett. 127, 071903.

28) A. G. Chakkar,  Deepu Kumar,  A. Kumar,  M. Kumar, and Pradeep Kumar,  Tunable resonant Raman scattering with temperature in vertically aligned 2H-SnS2, Nanoscale 17, 17579 (2025)

27) N. Khan, Deepu Kumar, S. Semwal, Y.Shemerliuk, B. Büchner, K. Pal, S. Aswartham, Pradeep Kumar, Short and long-range magnetic ordering and emergent topological transition in(Mn1−xNix)2P2S6. Scientific Reports 15, 4438 (2025)  

{2024}

26) Deepu Kumar, N. The Hoang, Y. Sim, Y. Choi, K. Raju, R. Kumar Ulaganathan, R. Sankar, Maeng-Je Seong, Kwang-Yong Choi, Interplay between magnetic and lattice excitations and emergent multiple phase transitions in MnPSe3-xSx, Physical Review B 110, 064414 (2024)

25) S. Deswal, Deepu Kumar, D. Rout, S. Singh, and Pradeep Kumar, Quasi-two-dimensional frustrated spin-1 triangular lattice antiferromagnet Ca3NiNb2O9: A proximate spin liquid,  Phy. Rev. B 110, 024430(2024)

24) Deepu Kumar, N. Khan, R. Kumar, M. Kumar, Pradeep Kumar, Tunable Resonance and Electron-Phonon Coupling in Layered MoS2, https://doi.org/10.48550/arXiv.2302.01662

23) N. Khan, Deepu Kumar, V. Kumar, Y. Shemerliuk, S. Selter, B. Büchner, K. Pal, S. Aswartham, Pradeep Kumar,  Interplay of topology and antiferromagnetic order in two-dimensional van der Waals crystals of (NixFe1-x)2P2S6, 2D Materials 11, 035018 (2024)

22) A. G. Chakkar, Deepu Kumar, Pradeep Kumar,  Broken weak and strong spin rotational symmetries and tunable interaction between phonon and the continuum in Cr2Ge2Te6, Phys. Rev. B 109, 134406 (2024)

{2023}

21) M. Badole, H. N. Vasavan, S. Saxena, A. K. Das, P. Gami, Deepu Kumar, S. Deswal, Pradeep Kumar, and S. Kumar, High-Performance [00l]‑Textured BiAlO3‑Doped K0.5Bi0.5TiO3 Ceramics, ACS Appl. Electro. Mat.  (2023). 

20) R. Wadhwa, D. Kaur, Y. Zhang, A. Alexender, Deepu Kumar, Pradeep Kumar, M. AG Namboothiry, Q. Qiao, Mukesh Kumar Fast Response and High-Performance UV-C to NIR Broadband Photodetector based on MoS2/a-Ga2O3 heterostructures and impact of Band-alignment and Charge Carrier Dynamics,  Applied Surface Science 632, 157597 (2023)

19) A. Kumar, A. P. Gutal, N. Sharma, Deepu Kumar, G. Zhang, H. Kim, Pradeep Kumar, M. Paranjothy, M. Kumar, M. S Strano, Investigations of Vacancy-Assisted Selective Detection of NO2 Molecules in Vertically Aligned SnS2, ACS Sensors 8, 1357 (2023)

18) V. Kumar, Deepu Kumar, B. Singh, Y. Shemerliuk, M. Behnami, B. Buchner, S. Aswartham, Pradeep Kumar, Fluctuating Fractionalized Spins in Quasi Two-dimensional Magnetic V0.85PS3, Physical Review B 107, 094417 (2023)

17) A. Mehta, Deepu Kumar, S. Dwivedi, S. Kumar, and Pradeep Kumar, Phonon dynamics in lead free perovskite (1-x) KNN-xBAN (x= 0.0–0.1): a temperature dependent raman study , Physica Scripta 98, 035711 (2023)

16) R. Wadhwa, A. Kumar, R. Sarkar, P. P. Mohanty, Deepu Kumar, S. Deswal, Pradeep Kumar, R. Ahuja, S. Chakraborty, M. Kumar, and M. Kumar, Pt Nanoparticles on Vertically Aligned Large Area MoS2 Flakes for Selective H2 Sensing at Room Temperature , ACS Applied Nano Materials 6, 2527 (2023) 

{2022}

15) K. Kaur, R. Wadhwa, A. Ghosh, N. Physics, Deepu Kumar, Pradeep Kumar and M. Kumar “Residual strain engineering in seed layer assisted Kesterite Cu2ZnSnS4 absorber layer, Materials Today Communications 33,104414 (2022)  

14) H. N. Vasavan, M. Badole , S. Dwivedi , Deepu Kumar , Pradeep Kumar , S. Kumar  Enhanced rate performance and specific capacity in Ti-substituted P2-type layered oxide enabled by crystal structure and particle morphology modifications, Chemical Engineering Journal  448, 137662 (2022). 

13) R. Wadhwa, A. Ghosh, Deepu Kumar, Pradeep Kumar and M. Kumar “Platinum nanoparticle sensitized plasmonic-enhanced broad spectral photodetection in large area vertical-aligned MoS2 flakes ” Nanotechnology 33, 255702 (2022) 

12) Deepu Kumar, R. Kumar, M. Kumar and Pradeep Kumar, "Coupled excitonic quasiparticles-electron-phonon and interlayer coupling in vertically and horizontally aligned MoS2 " Journal of Materials Chemistry C  10, 5684  (2022) 

11) Deepu Kumar, V. Kumar, R. Kumar, M. Kumar and Pradeep Kumar,“Electron-Phonon Coupling, Thermal Expansion Coefficient, Resonance Effect and Phonon Dynamics in High Quality CVD Grown Mono and Bilayer MoSe2 ” , Phys. Rev. B 105, 085419 (2022).

10) A. V. Agrawal, N. Kumar, Deepu Kumar , S. K. Jain, G. Gupta, Pradeep Kumar and M. Kumar, “Low-Voltage, self-powered and broadband photodetector with Ohmic, transparent and cost-effective AZO electrodes on vertical aligned MoS2 flakes  ”  Surfaces and Interfaces 30, 101813 (2022) 

9) A. Kumar, N. Sharma, A. P. Gutal, Deepu Kumar, Pradeep Kumar, M. Paranjothy and M. Kumar,  “Growth and NO2 Gas Sensing Mechanisms of Vertically aligned 2D SnS2 flakes by CVD: Experimental and DFT Studies  ” Sensors and Actuators B: Chemical 353, 131078 (2022) 

{2021}

8) B. Singh, Deepu Kumar, V. Kumar, M. Vogl, S. Wurmehl, S. Aswartham, B. Büchner and  Pradeep Kumar, “Fractional Spin fluctuations and quantum liquid signature in Gd2ZnIrO6”  Phys. Rev. B 104,134402, (2021) 

7) Deepu Kumar, B. Singh, R. Kumar, M. Kumar and P. Kumar, “ Davydov Splitting, Resonance Effect and Phonon Dynamics in CVD grown Layered MoS2 ”, Nanotechnology 32, 285705  (2021) 

{2020}

6) Deepu Kumar, B. Singh, R. Kumar, M. Kumar and Pradeep Kumar,  “Anisotropic Electron-Photon-Phonon Coupling in Layered MoS2”, J. Phys.: Condens. Matter 32, 415702 (2020) 

{2019}

5) Deepu Kumar, B. Singh, P. Kumar, V. Balakrishna and Pradeep Kumar, “Thermal Expansion Coefficient and Phonon Dynamics in Coexisting Allotropes of Monolayer WS2 Probed by Raman Scattering”,  J. Phys.: Condens. Matter 31, 505403 (2019) 

4) B. Singh, Deepu Kumar, K. Manna, A.K. Bera, G. A. Cansever, A. Maljuk, S. Wurmehl, B. Büchner, Pradeep Kumar, “Correlated Paramagnetism and Interplay of Magnetic and Phononic Degrees of Freedom in 3d-5d Coupled La2CuIrO6” ,J. Phys.: Condens. Matter 31, 485803 (2019) 

3) S. Dwivedi, N. Chamoli, T. Pareek, Deepu Kumar, Pradeep Kumar and S. Kumar, “Structural, dielectric, and piezoelectric properties of lead-free  (1 − x)K1/2Na1/2NbO3-xCa(Zn1/3Ta2/3)O3  perovskite solid solution”, J.  Mat. Sci.: Mat. Electro. 30, 15084 (2019) 

2) T. Pareek, S. Dwivedi, B. Singh, Deepu Kumar, Pradeep Kumar and S. Kumar , “ LiSnZr(PO4)3 : NASICON-type solid electrolyte with excellent room temperature Li+ conductivity”,  J. Alloys Comp. 777, 602 (2019)

{2018}

1)  A. K. Yadav, A. Verma, B. Singh, Deepu Kumar, S. Kumar, V. Srihari, H. K. Poshwal, Pradeep Kumar, S.-W. Liu, S. Biring and S. Sen “(Pb1-xBix)(Ti1-xMnx)O3 : Competing mechanism of tetragonal-cubic phase on A/B site modifications”,  J. Alloys Comp. 765, 278 (2018)

Conference Proceedings

2) Deepu Kumar, R. Kumar, M. Kumar and Pradeep Kumar "Anomalous phonons in vertically and horizontally aligned MoS2 ",Proceedings of the 65th DAE Solid State Physics Symposium 55, 1077 (2021)  

1) Deepu Kumar, B. Singh, S. Kumar, Pradeep Kumar, “Phonon Dynamics in LiZr1.9Al0.1(PO4)3: A Temperature Dependent Raman Study, AIP Confe. Proceedings 1942,140035 (2018)