Nabonita Deb Chowdhury
Articles written in Pramana – Journal of Physics
Volume 37 Issue 2 August 1991 pp 115-125
Nonlinear lattice dynamical theory for valence transition in rare earth compounds
Nabonita Deb Chowdhury Sankar P Sanyal
A nonlinear lattice dynamical theory is proposed to explain the mode softening in intermediate valence compound Sm0.75 Y0.25 S. In this theory we consider the breathing motion of the electron shells of Sm-ion to be nonlinear, and depend on temperature, resulting in strong electron-ion coupling. We calculate the salient features of the nonlinear breathing potential, which resembles the
Volume 39 Issue 2 August 1992 pp 101-108
Anharmonic oxygen vibration and mode softening in Tl2Ba2Ca2Cu3O10 superconductor
Nabonita Deb Chowdhury Sankar P Sanyal
The softening of the IR active 300 cm−1 phonon mode in Tl-2223 superconductor, around
Volume 96, 2022
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