s-d Coupling-Induced Dynamic Off-Centering of Cu Drives High Thermoelectric Performance in TlCuS, Animesh Bhui, Prasad V. D. Matukumilli, Shuva Biswas, Abdul Ahad, Anupama Ghata, Divya Rawat, Moinak Dutta, Ajay Soni, Umesh V. Waghmare, and Kanishka Biswas, Journal of the American Chemical Society 147, 4, 3758  (2025).

Chemical strain induced Rashba effect in two-dimensional Ruddlesden-Popper perovskites, Suhas K. T., Tisita Das, Aditya Singh, Azat Khadiev, Ajay Soni, Sudip Chakraborty, and Ranjani Viswanatha, Phys Rev B (2025).

Multiple charge density wave ordering and quantum coupling of collective excitations in layered GdTe3, Divya Rawat, Prabir Datta, Devesh Negi, Ivy Maria, Surajit Saha, Kanishka Biswas and Ajay Soni, Phys Rev B 110, 075155 (2024).

Anharmonic Rattling leading Ultra-Low Lattice Thermal Conductivity in Cu12Sb 4S13 Tetrahedrites, Kewal Singh Rana, Nidhi Pandey, Chandan Bera, Kanishka Biswas and Ajay Soni, RSC Journal of Materials Chemistry A 12, 22756 (2024),

Symmetry breaking and structure instability in ultra-thin 2H-TaS2 across charge density wave transition,  Divya Rawat, Aksa thomas, Ajay Partap Singh Rana, Chandan Bera and Ajay Soni, Phys Rev B 109, 155411 (2024).

Ultralow lattice thermal conductivity in complex structure Cu26V2Sn6Se32 due to interaction of low-frequency acoustic-optical phonons, Kewal Singh Rana, Debattam Sarkar, Nidhi Pandey, Aditya Singh, Chandan Bera, Kanishka Biswas and Ajay Soni, Phys Rev B 109, 115202 (2024),

Anharmonic Phonon Vibrations of Ag and Cu for Poor Lattice Thermal Conductivity in Superionic AgCrSe2 and CuCrSe2,Kewal Singh Rana, Aditya Singh, Animesh Bhui, Kanishka Biswas and Ajay Soni, ACS Applied Energy Materials 7, 14, 5621 (2024),

Tuning the robust magnetic properties in MPS3 (M=Mn, Fe, and Ni) by proximity-induced Dzyaloshinskii-Moriya interactions, Suvodeep Paul, Devesh Negi, Saswata Talukdar, Saheb Karak, Shalini Badola, Bommareddy Poojitha, Manasi Mandal, Sourav Marik, R. P. Singh, Nashra Pistawala, Luminita Harnagea, Aksa Thomas, Ajay Soni, Subhro Bhattacharjee, and Surajit Saha, Accepted in Phy Rev B (2024)

Chemically Transformed Ag2Te Nanowires on Polyvinylidene Fluoride Membrane For Flexible Thermoelectric Applications, Ankit Kashyap, Divya Rawat, Debattam Sarkar, Niraj Kumar Singh, Kanishka Biswas, Ajay Soni, Angewandte Chemie (2024) e202401234

Lattice Instability Induced Concerted Structural Distortion in Charged and van der Waals Layered GdTe3, Prabir Dutta, Sushmita Chandra, Ivy Maria, Koyendrila Debnath, Divya Rawat, Ajay Soni, Umesh V Waghmare, Kanishka Biswas, Advanced Functional Materials, 2312663 (2023).

Interaction of Acoustic and Optical Phonons in Soft Bonded Cu-Se Framework of Large Unit Cell Minerals with Anionic Disorders, Kewal Singh Rana, Raveena Gupta, Debattam Sarkar, Niraj Kumar Singh, Somnath Acharya, Satish Vitta, Chandan Bera, Kanishka Biswas and Ajay Soni, Phys Rev B 108, 045202 (2023), and draft version on Arxiv (2023),

Anisotropic Light-Matter Interactions in Single Crystal Topological Insulator Bismuth Selenide, Divya Rawat, Aditya Singh, Niraj Kumar Singh and Ajay Soni, Phys Rev B 107, 155203 (2023),

Extended Antibonding States and Phonon Localization Induce Ultralow Thermal Conductivity in Low Dimensional Metal Halide, Paribesh Acharyya, Koushik Pal, Abdul Ahad, Debattam Sarkar, Kewal Singh Rana, Moinak Dutta, Ajay Soni, Umesh V. Waghmare and Kanishka Biswas, Accepted in Advanced Functional Materials (2023).

Thermoelectricity in Ag/Cu Based Complex Crystal Structure Minerals with Inherent Low Thermal Conductivity, Kewal Singh Rana and Ajay Soni, Invited Review Article in Oxford Open Materials Science (2023),

Tuning the magnetic properties in MPS3 (M= Mn, Fe, and Ni) by proximity-induced Dzyaloshinskii Moriya interactions, Suvodeep Paul, Devesh Negi, Saswata Talukder, Saheb Karak , Ms Shalini Badola , Poojitha Bommareddy , Manasi Mandal , Sourav Marik , Ravi Singh , Nashra Pistawala , Luminita Harnagea , Aksa Thomas , Ajay Soni , Subhro Bhattacharjee and Surajit Saha, Under Review Nature Communications (2023).

Lattice Instability induced Concerted Structural Distortion in Charged and van der Waals Layered GdTe3, Prabir Dutta, Sushmita Chandra, Ivy Maria, Koyendrila Debnath, Divya Rawat, Ajay Soni, Umesh V. Waghmare and Kanishka Biswas, Under Review Advanced Materials (2023).

Glassy Thermal Conductivity in Cs3Bi2I6Cl3 Single Crystal, Paribesh Acharyya, Tanmoy Ghosh, Koushik Pal, Kewal Singh Rana, Moinak Dutta, Diptikanta Swain, Martin Etter, Ajay Soni, Umesh V. Waghmare, and Kanishka Biswas, Nature Communications 13, 5053 (2022).

Electron-Phonon Coupling and Quantum Correction to Topological Magnetoconductivity in Bi2GeTe4, Niraj Singh, Divya Rawat, Dibyendu Dey, Anna Elsukova, Per O. A. Persson, Per Eklund, A. Taraphder and Ajay Soni, Phys Rev B 105, 045134 (2022), arXiv:2110.06587 

Intrinsically Low Thermal Conductivity in n-type Vacancy-Ordered Double Perovskite Cs2SnI6: Octahedral Rotation and Anharmonic Rattling, Animesh Bhui, Tanmoy Ghosh, Kaushik Pal, Kewal Singh Rana, Kaushik Kundu, Ajay Soni and Kanishka Biswas, Chemistry of Materials 34, 7, 3301 (2022).

Local Symmetry Breaking Suppresses the Thermal Conductivity in Crystalline Solid,  Moinak Dutta, M. V. D. Prasad, Juhi Pandey, Ajay Soni, Umesh V. Waghmare and Kanishka Biswas, Angewandte Chemie (2022).

Low-Temperature Microwave Processed TiO2 as an Electron Transport Layer for Enhanced Performance and Atmospheric Stability in Planar Perovskite Solar Cells, Sudhir Ranjan, Rahul Ranjan, Ankit Tyagi, Kewal Singh Rana, Ajay Soni, Hari Krishna Kodali, Vikram Dalal, Anand Singh, Ashish Garg, Kanwar Nalwa and Raju K Gupta ACS Applied Energy Materials (2022),

Ultralow Thermal Conductivity and Thermoelectric Properties of Bi4GeTe7 with an Intrinsic van der Waal Heterostructure, Niraj Singh, Ankit Kashyap and Ajay Soni, Applied Physics Letters, 119, 223903 (2021).

Enhanced Atomic Ordering Leads to High Thermoelectric Performance in AgSbTe2, S. Roychowdhury, Tanmoy Ghosh, Raagya Arora, Manisha Samanta, Lin Xie, Niraj K Singh, Ajay Soni, Jiaqing He, Umesh V Waghmare and Kanishka Biswas, Science 371, 722-727 2021.

Ultralow Thermal Conductivity in Earth-Abundant Cu1.6Bi4.8S8: Anharmonic Rattling of Interstitial Cu, A. Bhui, M. Dutta, M. Mukherjee, Kewal Singh Rana, A. K. Singh,  Ajay Soni and Kanishka Biswas, Chem. Mater. 2021, 33, 8, 2993–3001  

Local Ferroelectric Polarization in Antiferroelectric Chalcogenide Perovskite BaZrS3 Thin Film, Juhi Pandey, Debjit Ghoshal, Dibyendu Dey, Tushar Gupta, A. Taraphder, Nikhil Koratkar and Ajay Soni, Phys. Rev. B 102, 205308 (2020) 

Crystalline Anharmonicity and Ultralow Thermal Conductivity in Layered Bi2GeTe4 for Thermoelectric Applications, Niraj Singh and Ajay Soni, Applied Physics Letters 117, 123901 (2020)

Intrinsically Ultralow Thermal Conductivity in Ruddlesden-Popper 2D Perovskite Cs2PbI2Cl2: Localized Anharmonic Vibrations and Dynamic Octahedral Distortions, Paribesh Acharyya, Tanmoy Ghosh, Koushik Pal, Kaushik Kundu, Kewal Singh Rana, Juhi Pandey, Ajay Soni, U.V. Waghmare and K. Biswas, The Journal of the American Chemical Society 142 (36), 15595(2020)

Electron-Phonon Interactions and Two Phonon Modes Associated with Charge Density Wave in Single Crystalline 1T-VSe2, Juhi Pandey and Ajay Soni, Physical Review Research 2, 033118 (2020) 

Spectroscopic Correlation of Chalcogen Defects in Atomically Thin MoS2(1-x) Se2x Alloys, Rahul Sharma, Juhi Pandey, Krishna Sahoo, Kewwal Singh Rana, Ravi kumar Biroju, Wolfgang Theis, Ajay Soni, T. N. Narayanan, Journal of Physics: Materials 3, 045001 (2020)

NrGO Floating Gate/SiOXNY Tunneling Layer Stack for Nonvolatile Flash Memory Applications, Mahesh Soni, Ajay Soni, S. K. Sharma, Accepted in IEEE Transactions on Device and Materials Reliability (2020). 

An Environmentally Stable and Lead-Free Chalcogenide Perovskite, Tushar Gupta, Debjit Ghoshal, Anthony Yoshimura, Swastik Basu, Philippe K. Chow, Aniruddha S. Lakhnot, Juhi Pandey, Jeffrey M. Warrender, Harry Efstathiadis, Ajay Soni, Eric Osei-Agyemang, Ganesh Balasubramanian, Shengbai Zhang, Su-Fei Shi, Toh-Ming Lu, Vincent Meunier and Nikhil Koratkar, Advanced Functional Materials 2001387, (2020) , 

Raman Spectroscopy Study of Phonon Liquid Electronic Crystal in Cu Deficient Superionic Thermoelectric Cu2-xTe, Juhi Pandey, Shriparna Mukherjee, Divya Rawat, Shoeb Athar, Kewal Singh Rana, Ramesh Chandra Mallik and Ajay Soni, ACS Applied Energy Materials 3, 3, 2175 (2020). 

Excitation Density Dependent Photoluminescence Studies on Homo-Epitaxial GaN Nanowall Networks Grown by Laser Assisted Molecular Beam Epitaxy, C Ramesh, Juhi Pandey, P Tyagi, A Soni, M Senthil Kumar, SS Kushvaha, Journal of nanoscience and nanotechnology 20 (6), 3866-3872 (2020)

Ultralow Thermal Conductivity in Chain Like TlSe due to Inherent Tl+ Rattling, Moinak Dutta, Shidaling Matteppanavar, Matukumilli V. D. Prasad, Juhi Pandey, Avinash Warankar, Pankaj Mandal, Ajay Soni, U.V. Waghmare and K. Biswas, Journal of the American Chemical Society 141, 51, 20293-20299 (2019). 

Selective Oxidation of WS2 Defect Domain with Sub-Monolayer Thickness Leads to Multifold Enhancement in Photoluminescence. P. Kumar, J. Biswas, Juhi Pandey, K. Thakar, Ajay Soni, S. Lodha, V. Balakrishnan, Advanced Materials Interfaces, 6(20), 1900962 (2019). 

Engineering ferroelectric instability to achieve ultralow thermal conductivity and high thermoelectric performance in Sn1-xGexTe, A. Banik, T. Ghosh, R. Arora, M. Dutta, Juhi Pandey, S. Acharya, Ajay Soni, U.V. Waghmare and Kanishka Biswas, Energy and Environmental Science, 12, 589 (2019). [DOI: 10.1039/C8EE03162B]

Enhancement of Power Factor for Inherently Poor Thermal Conductor Ag8GeSe6 by Replacing Ge with Sn, Somnath Acharya, Juhi Pandey and Ajay Soni, 2(1), 654 (2019)  ACS Applied Energy Materials (2018).

Melt spinning: A rapid and cost effective approach over ball milling for the production of nanostructured p-type Si80Ge20 with enhanced thermoelectric properties, Riya Thomas, Ashok Rao, Nagendra S. Chauhan, Avinash Vishwakarma, Niraj Kumar Singh, Ajay Soni,  Journal of  Alloy and Compounds, 781, 344 (2019).

Rare Earth Doping and Effective Band-Convergence in SnTe for Improved Thermoelectric Performance, Somnath Acharya, Dibyendu Dey, Tulika Maitra, Ajay Soni and A. Taraphder, Applied Physics Letters 113, 193904 (2018) 

Effect of ion-implantation-induced defects and Mg dopants on thermoelectric properties of ScN, Nina Tureson, Marc Marteau, Thierry Cabioch, Ngo Van Nong, Jens Jensen, Jun Lu, Daniele Fournier, Niraj Singh, Ajay Soni, Laurent Belliard, Per Eklund, Arnaud le Febvrier, Phys. Rev. B (Accepted) 2018. arXiv:1809.09027

Interface properties probed by active THz surface emission in graphene/SiO2/Si heterostructures, Yao Zehan, Zhu Lipeng, Huang Yuanyuan, Zhang Longhui, Du Wanyi, Lei Zhen, Soni Ajay, Xu Xin Long, ACS Applied Materials & Interfaces 2018, 10 (41), 35599.

Unraveling Biexciton and Excitonic Excited States from Defect Bound States in Monolayer MoS2, Juhi Pandey and Ajay Soni,  Applied Surface Science 463, 52 (2019).

Integration of Graphene Oxide Buffer Layer/Graphene Floating Gate for Wide Memory Window in Pt/Ti/Al2O3/GO/graphene/SiO2/p-Si/Au Non-Volatile (FLASH) Applications, Mahesh Soni, Ajay Soni, S. K. Sharma, Appl. Phys. Lett. accepted (2018).

Coupling of Charge Carriers with Magnetic Entropy for Power Factor Enhancement in Mn Doped Sn1.03Te for Thermoelectric Applications, Somnath Acharya, Sharmistha Anwar, Takao Mori and Ajay Soni, J. Mater. Chem. C accepted (2018).

Charge Carriers Modulation and Thermoelectric Performance of Intrinsically p-Type Bi2Te3 by Ge Doping, Niraj Singh, Juhi Pandey, Somnath Acharya and Ajay Soni,  Journal of Alloys and Compounds 746, 350 (2018) ,

Scalable and site specific functionalization of reduced graphene oxide for circuit elements and flexible electronics, Mahesh Soni, Pawan Kumar, Juhi Pandey, Satinder K. Sharma and Ajay Soni, Carbon 128, 172 (2018) ,

Nitrogen doped multilayer photo catalytically reduced graphene oxide floating gate: Al/PMMA/NrGO/SiO2/p–Si/Au based hybrid gate stack for non volatile memory applications, Mahesh Soni, Ajay Soni, S. K. Sharma, Organic Electronics 51, 48-53, (2017) ,

Reduction of the thermal conductivity of the thermoelectric material ScN by Nb alloying, Nina Tureson, Ngo Van Nong, Daniele Fournier, Niraj Singh, Somnath Acharya, Susann Schmidt, Laurent Belliard, Ajay Soni, Arnaud le Febvrier, and Per Eklund, Journal of Applied Physics 122, 025116 (2017) ,

Enhanced thermoelectric properties of Yb doped SnTe, Somnath Acharya and Ajay Soni AIP Conference Proceedings 1832, 110028 (2017).

Photo-catalytic reduction of oxygenated graphene dispersions for supercapacitor applications, Mahesh Soni, Pawan Kumar, Rudra Kumar, S. K. Sharma Ajay Soni, Journal of Physics D: Applied Physics 50, 124003, (2017) ,

Selective Detection of F— Using Al Microarrays Integrated Graphene Oxide, Mahesh Soni, Pawan Kumar, Ajay Soni and S. K. Sharma, Sensors and Actuators B: Chemical, 247, 224 (2017).

Soft phonon modes driven reduced thermal conductivity in self-compensated Sn1.03Te with Mn doping, Somnath Acharya, Juhi Pandey and Ajay Soni, Appl. Phys. Lett. 109, 133904 (2016).

Integration of Highly Sensitive Oxygenated Graphene With Aluminum Micro-Interdigitated Electrode Array Based Molecular Sensor for Detection of Aqueous Fluoride Anions, Mahesh Soni, Tarun Arora, Robin Khosla, Pawan Kumar, Ajay Soni and S. K. Sharma, IEEE Sensors Journal 16 (6) 1524 (2016) ,

Nanomaterial Synthesis, Characterization, and Application: Editorial, Mahmood Ghoranneviss, Ajay Soni, Alireza Talebitaher and Necdet Aslan, Journal of Nanomaterials, 892542 (2015)

Dual Gate Tunable and High Responsivity Graphene-Based Field Effect Transistors, Mahesh Soni, S. K. Sharma, and Ajay Soni, Macromolecular Symposia, Soft Materials, 357 (1) 12 (2015).    

Interface driven thermoelectric power of spark plasma sintered nanoplatelet composites of Bi2Te2.7Se0.3, Ajay Soni, S. Yiqiang, Y. Ming, Z. Yanyuan, Y. Ligen, H. Xiao, Z. Dong, M. K. K. Aik, M. S. Dresselhaus and Xiong Qihua, Nano Letters 12 (8) 4305 (2012)

Enhanced Thermoelectric Properties of Solution Grown Bi2Te3-xSex Nanoplatelet Composites, Ajay Soni, Y. Zhao, Y. Ligen, M. K. K. Aik, M. S. Dresselhaus and Xiong Qihua, Nano Letters 12(3), 1203 (2012)

Effect of Co-doping on the resistivity and thermopower of SmFe1-xCoxAsO (0.0=x=0.3), G. S. Okram, N. Kaurav, Ajay Soni, A. Pal, and V. P. S. Awana, AIP Advances 2, 042137 (2012)

Raman Spectroscopy of Few-Quintuple Layer Topological Insulator Bi2Se3 Nanoplatelets, Z. Jun, P. Zeping, Ajay Soni, P. Bo, Y. Zhao, J. Wang, M. S. Dresselhaus, and Q. Xiong, Nano Letters 11 (6), 2407–2414 (2011).

Magneto-resistance, thermal conductivity, thermo-electric power and specific heat of superconductor Gd0.95Pr0.05Ba2Cu2.94M0.06O(7-d) (M=Fe, Ni, Zn and Mn), T. Chakraborty, B. Gahtori, Ajay Soni, G. S. Okram, S. K. Agrawal, S. Y. Chen, Y. K. Kuo, M. A. H. Ahsan, Ashok Rao, Solid State Communications, 151(17), 1117-1121 (2011).

High Coercive Field and Magnetization Reversal in Core-shell Cum Nanotwin Driven Ni/NiO Nanospheres, G. S. Okram, Ajay Soni, D. T. Adroja, N. P. Lalla, and T. Shripathi J. Nanosci. Nanotechnol. 11, 2632-2635 (2011).

The pH-controlled particle size tuning of nanocrystalline Ni in polyol synthesis method without additional cappant, G. S. Okram, Ajay Soni and R. Prasad, Adv. Sci. Lett., 4, 132–135 (2011).

Electrical and thermal properties of bulk superconductors Eu0.95Pr0.05Ba2(Cu1-xMx)3O7-? (M=Fe, Ni, Zn and Mn), T. Chakraborty, B. Gahtori, Ajay Soni, G. S. Okram, S. K. Agarwal, Y.-S. Chen, Y.-K. Kuo, Geetha, A. Rao, C. K. Sarkar, Physica C: Superconductivity, 470, 244 (2010).

Negative thermopower of over doped Bi2Sr2CaCu2O8 superconductor, J. K. Bains, M. Mudgel, G. S. Okram, Ajay Soni, V. P. S. Awana, P. K. Ahluwalia, R. B. Saxena, H. Kishan, Physica C: Superconductivity, 470, S203 (2010).

The unusual electrical response in polyaniline - threonine composites, T. Mathavan, S. Umapathy, M.A. Jothirajan, M. Fatima Parveen, T.S. Vivekanandam, Ajay Soni, G. S. Okram, V. Ganesan, Materials Letters 64, 2009 (2010).

Effect of Mn substitution on the thermo-power of the superconductor Mg1-xMnxB2, A. Rao, T. Chakraborty, B. Gahtori, C. Sarkar, S. K. Agarwal, Ajay Soni, G. S. Okram, Journal of Physics: Conference Series 234, 012033 (2010).

Size dependent thermopower in nanocrystalline nickel, Ajay Soni and G. S. Okram, Appl. Phys. Lett. 95, 013101 (2009). (Virt. J. Sci. Technol. 20th July 2009).

Anomalous Thermoelectric power of over-doped Bi2Sr2CaCu2O8 superconductor, V. P. S. Awana, J. K. Bains, G. S. Okram, Ajay Soni and H. Kishan, J. Appl. Phys. 106, 096102 (2009).

Electrical properties of polyaniline doped with metal ions, J. B. M. Krishna, A. Saha, G. S. Okram, Ajay Soni, S. Purakayastha and B. Ghosh, J. Phys. D: Appl. Phys. 42, 095404 (2009).

Resistivity and thermopower measurement set-ups in the temperature range of 5-325 K, Ajay Soni and G. S. Okram, Rev. Sci. Instru. 79, 125103 (2008).

Anomalous electrical transport in nanocrystalline nickel, G. S. Okram, Ajay Soni and R. Rawat, Nanotechnology, 19, 185711 (2008).

Grain size effect on lattice of Ni nanocrystals prepared through polyol method, G. S. Okram, K. N. Devi, H. Sanatombi, Ajay Soni, V. Ganesan and D. M. Phase, J. Nanosci. Nanotech. 8, 4127 (2008).

Thickness dependent structural, electronic and optical properties of Ge- nanostructures, S. Tripathi, R. Brajpuriya, A. Sharma, Ajay Soni, G. S. Okram, S. M. Chaudhari and T. Shripathi, J. Nanosci. Nanotech 8, 2955 (2008).

Low temperature electrical resistivity of cupric telluride thin films, K. Neyvasagam, N. Soundararajan, Ajay Soni, G. S. Okram, and V. Ganesan, Phys. Stat. Solid. (b) 245, 77 (2008).

Sonochemical Synthesis of Poly (Methyl Acrylate), M. A. J. Rajan, T. Mathavan, T. S. Vivekanandam, S. Umapathy, V. Ganesan, G. S. Okram and Ajay Soni, Sol. Sta. Phenom., 136, 175 (2008).

Ammoximation of Cyclohexanone over nanoporous TS-1 using UHP as an Oxidant, S. Saxena, J. Basak, N. Hardia, R. Dixit, S. Bhadauria, R. Dwivedi, R. Prasad, Ajay Soni, G. S. Okram, and Ajay Gupta, Chem. Eng. J. 132, 61 (2007).