Scientific Commons: S. L. Chaplot

Inelastic neutron scattering and lattice dynamical calculations in BaFe2As2 (2008)

Mittal, R., Su, Y., Rols, S., Chatterji, T., Chaplot, S. L., Schober, H., ...

We report here first extensive measurements of the temperature dependence of phonon density of states of BaFe2As2, the parent compound of the newly discovered FeAs-based superconductors, using...

Lattice dynamical calculations of infinite layer iron oxides SrFeO2 and CaFeO2 (2008)

Mittal, R., Chaplot, S. L., Su, Y.

We report extensive lattice dynamical calculations of the newly discovered infinite-layer iron oxides SrFeO2 and CaFeO2. For SrFeO2, the parameters of the interatomic potential have been determined...

Fast ion diffusion, superionic conductivity and phase transitions of the nuclear materials UO2 and Li2O (2007)

Goel, Prabhatasree, Choudhury, N., Chaplot, S. L.

Lattice dynamics and molecular dynamics studies of the oxides UO2 and Li2O in their normal as well as superionic phase are reported. Lattice dynamics calculations have been carried out using a shell...

Competing antiferroelectric and ferroelectric interactions in NaNbO3 : Neutron diffraction and theoretical studies (2007)

Mishra, S. K., Choudhury, N., Chaplot, S. L., Krishna, P. S. R., Mittal, R.

Neutron diffraction studies using powder samples have been used to understand the complex sequence of low temperature phase transitions of NaNbO3 in the temperature range from 12 K-350 K. Detailed...

Ab initio studies of phonon softening and high pressure phase transitions of alpha-quartz SiO2 (2006)

Choudhury, N., Chaplot, S. L.

Density functional perturbation theory calculations of alpha-quartz using extended norm conserving pseudopotentials have been used to study the elastic properties and phonon dispersion relations...

Collective dynamics in crystalline polymorphs of ZnCl$_{2}$: potential modelling and inelastic neutron scattering study (2005)

Sen, A., Rao, Mala N., Mittal, R, Chaplot, S. L.

We report a phonon density of states measurement of $\alpha$-ZnCl$_{2}$ using the coherent inelastic neutron scattering technique and a lattice dynamical calculation in four crystalline phases of...

Lattice vibrations in high-pressure phases of LiYF$_{4}$ (2005)

Sen, A., Chaplot, S. L., Mittal, R.

Possible variations in the dynamical behaviour of LiYF$_{4}$ due to its several structural changes under pressure are examined by making use of the complementary techniques of quasi-harmonic lattice...

Vibrational and thermodynamic properties of high-pressure phases in LiYF_4 (2004)

Sen, A., Chaplot, S. L., Mittal, R.

Possible variations in the dynamical behaviour of LiYF$_{4}$ due to its structural changes following several pressure-induced phase transitions are examined by making use of the complementary...

Lattice dynamics calculations and phonon dispersion measurements of zircon, ZrSiO4 (2000)

Mittal, R, Chaplot, S L, Parthasarathy, R, Bull, M J, Harris, M J

Lattice dynamics and inelastic neutron scattering from sillimanite and kyanite Al2SiO5 (1999)

Rao, M N, Chaplot, S L, Choudhury, N, Rao, K R, Azuah, R T, Montfrooij, W T, ...

Tetracyanoethylene at high pressure: in situ neutron diffraction study (1997)

Mukhopadhyay, R, Chaplot, S L, Rao, K R, Hull, S

in Advances in High Pressure Research in Condensed Matter, Eds S K Sikka, S C Gupta, B K Godwal (NISC, New Delhi) p349 (1997)

Phonon dispersion relation in zircon: an inelastic neutron scattering study (1997)

Mittal, R, Chaplot, S L, Pathasarathi, R, Harris, M J, Bull, M J

Inelastic neutron scattering measurements on kyanite, Al2SiO5 (1997)

Rao, M N, Chaplot, S L, Choudhury, N, Montfrooij, W T, Bennington, S M

Neutron diffraction study in tetracyanoethylene at high pressure (1996)