Yogendar Singh

Biography

Yogendar Singh joined the Geosciences Environment Toulouse (GET) in January 2026 as a postdoctoral researcher in the ERC advanced “PLANETAFELSIC” project under the mentorship of Dr. HDR Anastassia Borisova. Before his appointment at GET, Yogendar completed his PhD in Physics at Jawaharlal Nehru University (JNU), New Delhi, India, where his doctoral thesis focused on the order-disorder phase transition in pyrochlore oxides under pressure, irradiation, and temperatures.

His postdoc research at GET is focused on the structural stability of zircons under high pressure and the behavior of trace elements in radiation-damaged structures. The motivation is to better understand the early evolution of the Earth's crust and habitability by studying the physical-chemical conditions of zircon under extreme conditions. He utilizes advanced characterisation techniques, such as synchrotron high-pressure, high-temperature X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), particle accelerator for ion irradiation, and other laboratory-based analytical methods.

Education

· PhD in Physics, Jawaharlal Nehru University, New Delhi, India.

· Master's Degree in Science (M.Sc. in Physics), University of Rajasthan, Jaipur, India.

· Bachelor's Degree in Science (Physics, Chemistry, Maths), University of Rajasthan, Jaipur, India.

Research experience

01/2026 – present Postdoctoral researcher- Toulouse, France

Geosciences Environnement Toulouse, GET, CNRS, UMR5563

Research mentor: Dr. HDR Anastassia Borisova

Research area: Postdoctoral Researcher on the study of the

physicochemical- conditions of crystallization and survival of zircon

09/2025 - 09/2025 Visiting researcher- Toulouse, France

Geosciences Environnement Toulouse, GET, CNRS, UMR5563

Research mentor: Dr. HDR Anastassia Borisova

01/2021 - 08/2025 PhD Thesis – New Delhi, India

School of Physical Sciences, Jawaharlal Nehru University (JNU)

Advisor: Prof. Pawan Kumar Kulriya

Thesis title: Order-Disorder Phase Transition in Pyrochlore Oxides

under Pressure, Irradiation, and Temperature

11/2021 - 02/2022 Junior Research Fellow – New Delhi, (JRF) in BRNS, Govt. of India

funded project, School of Physical Sciences, JNU

Project title: Effect of structure, microstructure of complex oxides on

swift heavy ion implantation and their release behaviour.

Journal articles

1. Y. Singh, Christophe Le Roux, Anastassia Borisova, Fabien Bernadou, Ludovic Menjot, Teresa Hungria, Claudie Josse, Nanometric zircon: A synthetic approach to closely resembling natural grains for geological implications, Under review, American Mineralogist, (2026).

2. V. Kumar, A. Pandey, G. Kumar, Y. Singh, S. K. Sharma, A. Hussain, N. Singh, S. Singh, M. N. Singh, P. K. Kulriya, Grain Size Effects on Structural Stability of Ce0.75Zr0.25O2 under Low Energy Ion Irradiation, Under review, Journal of the European Ceramic Society, (2026).

3. V. Kumar, A. Pandey, G. Kumar, Y. Singh, S. K. Sharma, A. Hussain, N. Singh, S. Singh, M. N. Singh, P. K. Kulriya, Probe-Dependent Ion-Track Length Scales in Ce0.8Zr0.2O2 under Swift Heavy Ion Irradiation, Submitted, Journal of Nuclear Materials, (2026).

4. V. Kumar, S. K. Sharma, Y. Singh, V. K. Malik, V. Grover, P. K. Kulriya, Swift Heavy Ion-Induced Defect Formation and Electronic Structure Evolution in Zr-Doped CeO2(Ce0.8Zr0.2O2), Journal of the American Ceramic Society, 109 (2026) e70310. https://doi.org/10.1111/jace.70310

5. S. Rachamalla, Y. Singh, M. Gupta, S. K. Kedia, R. Kaur, P. K. Kulriya, A.D.P. Rao, Insights into Irradiation-Induced phase evolution and structural modifications in zirconolite, Ceramic International, 51 (2025) 60879-60888. https://doi.org/10.1016/j.ceramint.2025.10.282

6. V. Kumar, Y. Singh, A. Pandey, S. K. Sharma, R. K. Sharma, V. Grover, P. K. Kulriya, Spectroscopic insights into structural and electronic modifications in Ce0.8Zr0.2O2 under low-energy ion irradiation, Journal of Applied Physics, 138 (2025) 135903. https://doi.org/10.1063/5.0290646

7. Y. Singh, X. Su, V. Kumar, H. K. Poswal, K. K. Pandey, P. K. Kulriya, Pressure-induced structural disordering and anomalous pressure-volume behaviour in high-entropy zirconates, available on arXiv. https://doi.org/10.48550/arXiv.2506.01834

8. Y. Singh, V. Kumar, T. Vazhappilly, H. K. Poswal, K. K. Pandey, P. K. Kulriya, Structural stability of the robust GdYTi2O7 pyrochlore under high pressure, Journal of the American Ceramic Society, 108 (2025) e20444. https://doi.org/10.1111/jace.20444

9. Y. Singh, A. Kumar, V. Kumar, A. Chattaraj, K. K. Pandey, P. K. Kulriya, Thermally activated damage recovery in ion-irradiated Gd2Ti2-yZryO7 (y=0.4,1.2,1.6) pyrochlore, Journal of the American Ceramic Society, 108 (2025) e20124. https://doi.org/10.1111/jace.20124

10. Y. Singh, S. K. Sharma, V. Kumar, P. Rajput, G. Manna, P. K. Kulriya, Investigations of local structure and phase recovery in irradiated Nd2Zr2O7 pyrochlore, Journal of Materials Chemistry C, 12 (2024) 13525. https://doi.org/10.1039/D4TC02652G

11. Y. Singh, V. Kumar, S. K. Sharma, T. Vazhappilly, J. Lian, P. K. Kulriya, Investigations of thermal conductivity in nanocrystalline Gd2Ti2O7 pyrochlore, Journal of Alloys and Compounds, 990 (2024) 174249. https://doi.org/10.1016/j.jallcom.2024.174249

12. V. Kumar, S. K. Sharma, Y. Singh, S. Kedia, R. C. Meena, V. Gupta, P. K. Kulriya, Quantification of 1.75 MeV Xe5+ induced defects in Zirconia doped Ceria (Ce0.8Zr0.2O2), Journal of Applied Physics, 134 (2023) 065902. https://doi.org/10.1063/5.0159046

13. A. Kumawat, S. Charan, N. Sharma, P. K. Kulriya, Y. Singh, S. Srivastava, Synthesis of Graphene-like Nano Order Thick Graphitic Flakes Through Industrial Waste Carbon and Study of Their Hydrogen Gas Sensing Properties, International Journal of Hydrogen Energy, 48 (2023) 38101. https://doi.org/10.1016/j.ijhydene.2022.11.280

14. A. Kumar, V. Grover, Y. Singh, V. Kumar, P. K. Kulriya, Probing the Short Range Orderness of Ion Irradiated Gd2Ti2-yZryO7 Pyrochlore under Electron Stopping Regime, Journal of Nuclear Materials, 564 (2022) 153682. https://doi.org/10.1016/j.jnucmat.2022.153682

Book chapters

1. Y. Singh, S. K. Sharma, P. K. Kulriya, Radiation Effects in Pyrochlore Structured Ceramics, Chapter in "Nuclear Materials in Handbook of Materials Science" Edited by R. S. Ningthoujam, A. K. Tyagi, Springer Nature, 2025 (Under review).

Conferences

Service to the scientific community

1. Session chair assistant, Session 4: Minerals in Extreme Environments: From Earth's Depths to Space, The 3rd International Online Conference on Mineral Science, March 10-12, 2026.

Contributed talks

1. Y. Singh, A. Borisova, P. K. Kulriya, Pressure-induced disordering and structural stability of high entropy zirconates, 15th High Pressure Technology Forum (HP Forum 2026- “30 years of progress in high pressure technologies: past, present and future challenges”), June 15-19, 2026. (Poster presentation)

2. Y. Singh, V. Kumar, A. Chattaraj, P. K. Kulriya, Monitoring the Recovery of Crystalline Phases in Irradiated Pyrochlores, Advanced Functional Materials & Devices for Sustainable Development (AFMD-2025), Atma Ram Sanatan Dharma College, University of Delhi, March 3-5, 2025. (Oral presentation)

3. Y. Singh, V. Kumar, P. Rajput, P. K. Kulriya, EXAFS study of swift heavy irradiation-induced structural modifications and damage recovery in Nd2Zr2O7 pyrochlore, International Conference on Materials and Thermophysical Properties (ICMTP- 2024), University of Rajasthan, November 21-23, 2024. (Oral Presentation)

4. Y. Singh, V. Kumar, K. K. Pandey, P. K. Kulriya, High-pressure behaviour of GdYTi2O7 pyrochlore using synchrotron X-ray diffraction, International Conference on Materials for Energy and Sustainable Development (MESD-2023), Organized by School of Physical Sciences, JNU, October 27-29, 2023. (Oral presentation)

5. Y. Singh, V. Kumar, S. K. Sharma, V. Grover, P. K. Kulriya, Thermal conductivity of nanocrystalline Gd2Ti2O7 pyrochlore for inert matrix application, 9th Interdisciplinary Symposium on Materials Chemistry (ISMC−2020), BARC, Mumbai, December 7-10, 2022. (Poster presentation)

Professional associations

• Member of Indian Crystallographic Association (ICA) (2025-2030) (SM-401)

• Life Member of Indian Physics Association (IPA) (LM-2022-DEL-13715)

• Life Member of Indian Nuclear Society (INS) (LM-12900)

• Life Member of Society for Materials Chemistry (SMC), India (LM-1748)

• Life Member of Vigyan Bharti (VIBHA), India

Experience/visit to Synchrotron source/Large Scale Facilities

1. Feb 22- March 02, at the BM23 beamline of ESRF, Grenoble, France. (High-pressure-high-temperature XAS measurements using Paris-Edinburgh Press)

2. June 11-20, 2025, at BL-18B (Versatile hard X-ray station) beamline of Photon Factory, Japan. (High-temperature GIXRD measurements)

3. Dec 11-16, 2024 at BL-11 (Extreme conditions ADXRD/EDXRD) beamline of Indus-2, RRCAT, India. (High-pressure ADXRD measurements using DAC)

4. Dec 11-16, 2024 at BL-09 (Scanning EXAFS) beamline of Indus-2, RRCAT, India. (EXAFS measurements)

5. April 22-28, 2024, at BL-11 (Extreme conditions ADXRD/EDXRD) beamline of Indus-2, RRCAT, India. (High-pressure ADXRD measurements using DAC)

6. May 05-14, 2023, at BL-18B (Versatile hard X-ray station) beamline of Photon Factory, Japan. (High-temperature GIXRD measurements)

7. March 13-17, 2023, at BL-11 (Extreme conditions ADXRD/EDXRD) beamline of Indus-2, RRCAT, India. (High-pressure ADXRD measurements using DAC)

8. Aug 07-15, 2022, at UGC-DAE CSR, Indore, India, to carry out piezoelectric coefficient (d33) and dielectric measurements.

9. Feb 13-17, 2022, (Sample shipped) to BL-18B (Versatile hard X-ray station) beamline of Photon Factory, Japan. (High-temperature GIXRD measurements)

10. Dec 15, 2021, National-level committee approved my proposal during pre-PhD to access the accelerator-based facilities during Ph.D. thesis at the Inter-University Accelerator Centre (IUAC), New Delhi Inter University Accelerator Centre (IUAC), New Delhi.

Contact:

Email: yogendar.singh@cnrs.fr

Google scholar: https://scholar.google.com/citations?hl=en&user=h6RphW4AAAAJ

Personal webpage: https://sites.google.com/view/yogendarsingh-cnrs/home