Zobrazeno 1 - 10
of 179
pro vyhledávání: '"Mittal, Ranjan"'
Autor:
Jangra, Divya, De, Binoy Krishna, Sharma, Pragati, Chakraborty, Koushik, Parate, Shubham, Yogi, Arvind Kumar, Mittal, Ranjan, Gupta, Mayanak K, Nukala, Pavan, Velpula, Praveen Kumar, Sathe, Vasant G.
The anisotropic light-matter interactions in 2D materials have garnered significant attention for their potential to develop futuristic polarization-based optoelectronic devices, such as photodetectors and photo-actuators. In this study, we investiga
Externí odkaz:
http://arxiv.org/abs/2409.17570
Autor:
Kumar, Sajan, Gupta, Mayanak K., Goel, Prabhatasree, Mittal, Ranjan, Mukhopadhyay, Sanghamitra, Le, Manh Duc, Shukla, Rakesh, Achary, Srungarpu N., Tyagi, Avesh K., Chaplot, Samrath L.
We present the investigations on atomic dynamics and Li+ diffusion in crystalline and amorphous Li2Si2O5 using quasielastic (QENS) and inelastic neutron scattering (INS) studies supplemented by ab-initio molecular dynamics simulations (AIMD). The QEN
Externí odkaz:
http://arxiv.org/abs/2210.09003
Autor:
Mittal, Ranjan, Kumar, Sajan, Gupta, Mayanak K., Mishra, Sanjay K., Mukhopadhyay, Sanghamitra, Le, Manh Duc, Shukla, Rakesh, Achary, Srungarpu N., Tyagi, Avesh K., Chaplot, Samrath L.
We have performed quasielastic and inelastic neutron scattering (QENS and INS) measurements from 300 K to 1173 K to investigate the Na-diffusion and underlying host dynamics in Na2Ti3O7. The QENS data show that the Na atoms undergo localized jumps up
Externí odkaz:
http://arxiv.org/abs/2107.09905
Publikováno v:
In International Journal of Hydrogen Energy 29 February 2024 57:394-407
Autor:
Gupta, Mayanak K., Mittal, Ranjan, Kumar, Sajan, Singh, Baltej, Delaire, Niina H Jalarvo Olivier, Shukla, Rakesh, Achary, Srungarpu N., Kolesnikov, Alexander I., Tyagi, Avesh K., Chaplot, Samrath L.
We have performed quasielastic neutron scattering (QENS) experiments up to 1243 K and ab-initio molecular dynamics (AIMD) simulations to investigate the Na diffusion in various phases of NaAlSiO4 (NASO), namely, low-carnegieite (L-NASO; trigonal), hi
Externí odkaz:
http://arxiv.org/abs/2104.09236
We have performed ab-initio molecular dynamics simulations to elucidate the mechanism of the phase transition at high pressure from hexagonal graphite (HG) to hexagonal diamond (HD) or to cubic diamond (CD). The transition from HG to HD is found to o
Externí odkaz:
http://arxiv.org/abs/2102.10893
Autor:
Mittal, Ranjan, Gupta, Mayanak K., Mishra, Sanjay K., Wajhal, Sourabh, Babu, Peram Delli, Singh, Baltej, Shinde, Anil Bhimrao, Krishna, Poluri Siva Rama, Singhal, Rakesh K., Ranjan, Rakesh, Chaplot, Samrath Lal
Structural as well as magnetization studies have been carried out on graphite samples irradiated by neutrons over 50 years in the CIRUS research reactor at Trombay. Neutron diffraction studies reveal that the defects in irradiated graphite samples ar
Externí odkaz:
http://arxiv.org/abs/2008.04032
Autor:
Gupta, Mayanak K., Mittal, Ranjan, Singh, Baltej, Delaire, Olivier, Achary, Srungarpu N., Rols, Stephane, Tyagi, Avesh K., Chaplot, Samrath L.
Publikováno v:
Phys. Rev. B 103, 174109 (2021)
We report on investigations of phonons and lithium diffusion in LiAlO$_2$ based on inelastic neutron scattering (INS) measurements of the phonon density of states (DOS) in {\gamma}-LiAlO$_2$ from 473 K to 1073 K, complemented with ab-initio molecular
Externí odkaz:
http://arxiv.org/abs/2008.03190
We have investigated the anisotropic thermal expansion of graphite using ab-initio calculation of lattice dynamics and anharmonicity of the phonons, which reveal that the negative thermal expansion (NTE) in the a-b plane below 600 K and very large po
Externí odkaz:
http://arxiv.org/abs/2005.05778
Autor:
Gupta, Mayanak K., Mittal, Ranjan, Mishra, Sanjay K., Goel, Prabhatasree, Singh, Baltej, Rols, Stephane, Chaplot, Samrath L.
We report detailed temperature-dependent inelastic neutron scattering and ab-initio lattice dynamics investigation of magnetic perovskites YCrO3 and LaCrO3. The magnetic neutron scattering from the Cr ions exhibits significant changes with temperatur
Externí odkaz:
http://arxiv.org/abs/2004.01731