@article{AvilovKulyginPietschetal.1999,
  author    = {Avilov, Anatoly S. and Kulygin, Alexander K. and Pietsch, Ullrich and Spence, John C. H. and Tsirelson, Vladimir G. and Zuo, Ming J.},
  title     = {Scanning system for high-energy electron diffractometry},
  issn      = {0021-8898},
  doi       = {10.1107/S0021889899006755},
  year      = {1999},
  language  = {en}
}
@article{TsirelsonAbramovZavodniketal.1998,
  author    = {Tsirelson, Vladimir G. and Abramov, Yury Fedorovich and Zavodnik, Valerie E. and Stash, Adam I. and Belokoneva, Elena L. and Stahn, Jochen and Pietsch, Ullrich and Feil, Dirk},
  title     = {Critical pionts in a crystal an procrystal},
  year      = {1998},
  language  = {en}
}
@article{AvilovLepeshovPietschetal.2001,
  author    = {Avilov, Anatoly S. and Lepeshov, G. G. and Pietsch, Ullrich and Tsirelson, Vladimir G.},
  title     = {Multipole analysis of the electron density and electrostatic potential in Germanium by high-resolution electron diffraction},
  issn      = {0022-3697},
  year      = {2001},
  language  = {en}
}
@article{TsirelsonAvilovLepeshovetal.2001,
  author    = {Tsirelson, Vladimir G. and Avilov, Anatoly S. and Lepeshov, G. G. and Kuligin, A. K. and Stahn, Jochen and Pietsch, Ullrich and Spence, J. C. H.},
  title     = {Quantitative Analysis of the Inner-Crystal Electrostatic Potential of several Rock-Salt-Structure Crystals Using Accurate Electron-Diffraction Data},
  issn      = {1089-5647},
  year      = {2001},
  language  = {en}
}
@article{PietschTsirelsonGorfan2003,
  author    = {Pietsch, Ullrich and Tsirelson, Vladimir G. and Gorfan, S. V.},
  title     = {X-ray scattering amplitude of an atom in a permanent external electric field},
  year      = {2003},
  language  = {en}
}
@article{GorfmanTsirelsonPietsch2005,
  author    = {Gorfman, S. V. and Tsirelson, Vladimir G. and Pietsch, Ullrich},
  title     = {X-ray diffraction by a crystal in a permanent external electric field : general considerations},
  issn      = {0108-7673},
  year      = {2005},
  abstract  = {The variations of X-ray diffraction intensities from a crystal in the presence of a permanent external electric field is modeled analytically using a first-order stationary perturbation theory. The change in a crystal, induced by an external electric field, is separated into two contributions. The first one is related to a pure polarization of an electron subsystem, while the second contribution can be reduced to the displacements of the rigid pseudoatoms from their equilibrium positions. It is shown that a change of the X-ray diffraction intensities mainly originates from the second contribution, while the influence of the pure polarization of a crystal electron subsystem is negligibly small. The quantities restored from an X-ray diffraction experiment in the presence of an external electric field were analyzed in detail in terms of a rigid pseudoatomic model of electron density and harmonic approximation for the atomic thermal motion. Explicit relationships are derived that link the properties of phonon spectra with E-field-induced variations of a structure factor, pseudoatomic displacements and piezoelectric strains. The displacements can be numerically estimated using a model of independent atomic motion if the Debye - Waller factors and pseudoatomic charges are known either from a previous single-crystal X-ray diffraction study or from density functional theory calculations. The above estimations can be used to develop an optimum strategy for a data collection that avoids the measurements of reflections insensitive to the electric-field-induced variations},
  language  = {en}
}