74 citations
- Centre National de la Recherche ScientifiqueFR8 papers
- École Centrale ParisFR8 papers
- Indian Institute of Science BangaloreIN2 papers
- Institut de Chimie Moléculaire et des Matériaux d'OrsayFR2 papers
- Université Paris-SudFR2 papers
- Bhabha Atomic Research CentreIN1 paper
- Friedrich-Alexander-Universität Erlangen-NürnbergDE1 paper
- Jožef Stefan InstituteSI1 paper
- Laboratoire de physique de la matière condenséeFR1 paper
- Physico-Technical InstituteRU1 paper
- Southern Federal UniversityRU1 paper
- Tata Institute of Fundamental ResearchIN1 paper
8 papers
Fourier-Legendre expansion of the one-electron density-matrix of ground-state two-electron atoms
Sebastien Ragot, Maria Belen Ruiz
The density-matrix rho(r, r') of a spherically symmetric system can be expanded as a Fourier-Legendre series of Legendre polynomials Pl(cos(theta) = r.r'/rr'). Application is here…
Low temperature and high pressure Raman and x-ray studies of pyrochlore TbTiO : phonon anomalies and possible phase transition
Surajit Saha, D. V. S Muthu, Surjeet Singh +8
We have carried out temperature and pressure-dependent Raman and x-ray measurements on single crystals of TbTiO. We attribute the observed anomalous temperature depende…
Spin-lattice coupling in multiferroic Pb(Fe1/2Nb1/2)O3 thin films
W. Peng, N. Lemée, M. Karkut +7
We have made magnetization and x-ray diffraction measurements on an epitaxial Pb(Fe1/2Nb1/2)O3 200 nm film. From the temperature dependence of the out-of-plane lattice parameter we…
Landau free energy of ferroelectric crystals by thermodynamic integration
Gregory Geneste
Using Molecular Dynamics simulations based on the effective hamiltonian developed by Zhong, Vanderbilt and Rabe [Phys. Rev. Lett. {\bf 73}, 1861 (1994)] (and fitted on first-princi…
Temperature dependent Raman and x-ray studies of spin-ice pyrochlore and non-magnetic pyrochlore
Surajit Saha, Surjeet Singh, B. Dkhil +5
We present here temperature-dependent Raman, x-ray diffraction and specific heat studies between room temperature and 12 K on single crystals of spin-ice pyrochlore compound $Dy_2T…
Comments on the momentum density and the spatial form of the density-matrix of the Hooke's atom
Ragot Sebastien
In a recent paper, A. Akbari, N. H. March and A. Rubio [Phys. Rev. A. 76, 032510 (2007)] have investigated the one-electron reduced density-matrix and the momentum density of sever…