300 citations · 1.1k across the 25 of their papers we have counts for
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Phonons and Thermodynamics of LiMPO4 (M=Mn, Fe)
Prabhatasree Goel, M. K. Gupta, R. Mittal +5
Lithium transition metal phospho-olivines are useful electrode materials, owing to their stability, high safety, low cost and cyclability. We report phonon studies using neutron in…
Negative Thermal Expansion in cubic ZrW2O8: Role of Phonons in Entire Brillouin Zone From ab-inito Calculations
M. K. Gupta, R. Mittal, S. L. Chaplot
We report ab-inito density functional theory calculation of phonons in cubic phase of ZrW2O8 in the entire Brillouin zone and identify specific anharmonic phonons that are responsi…
Evidence for anomalous structural behavior in CaFe2As2
S. K. Mishra, R. Mittal, P. S. R. Krishna +5
The structural properties of the CaFe2As2 have been investigated by x-ray and neutron powder diffraction techniques as a function of temperature. Unambiguous experimental evidence…
Spin-Lattice Coupling in K0.8Fe1.6Se2 and KFe2Se2: Inelastic Neutron Scattering and ab-initio Phonon Calculations
R. Mittal, M. K. Gupta, S. L. Chaplot +6
We report measurements of the temperature dependence of phonon densities of states in K0.8Fe1.6Se2 using inelastic neutron scattering technique. While cooling down to 150 K, a phon…