Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Winfried Kress"'
Autor:
Winfried Kress, Frederik W. de Wette
In recent years substantial progress has been made in the detection of surface phonons owing to considerable improvements in inelastic rare gas scattering tech niques and electron energy loss spectroscopy. With these methods it has become possible
Publikováno v:
Physical Review B. 62:17012-17019
A study of the surface lattice dynamics of $s\ensuremath{-}p$ bonded Mg(0001) using momentum-resolved inelastic electron scattering and ab initio calculations is reported. Three phonon modes at $\overline{K}$ and four phonon modes at $\overline{M}$ w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84ed765853a2bdbe99bbb0947b50d7f9
https://doi.org/10.1103/physrevb.62.17012
https://doi.org/10.1103/physrevb.62.17012
Publikováno v:
Journal of Physics: Condensed Matter. 8:1135-1150
The phonon dispersion curves of the transverse acoustic (TA) and the lowest transverse optic (TO) branches in the (001) direction of two (KTN) crystals with niobium concentrations of 0.8 and 1.2 at.% have been measured by inelastic neutron scattering
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71a22b02f1d79f8987f7da3c22456e72
https://doi.org/10.1088/0953-8984/8/9/006
https://doi.org/10.1088/0953-8984/8/9/006
Publikováno v:
Journal of Electron Spectroscopy and Related Phenomena. :769-775
We extend to crystals of the rutile structure our previous studies of the surface dynamics of ionic crystals within the framework of the shell model. These crystals have many interesting features due to their relatively open structure. Among the crys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95e1984b21e60cd85199ad43011a34f6
https://doi.org/10.1016/0368-2048(93)80148-f
https://doi.org/10.1016/0368-2048(93)80148-f
Publikováno v:
Surface Science. 297:245-251
We have treated the relaxation and the dynamics of the (110) surfaces of the cesium halogens CsCI, CsBr and CsI in the framework of shell models, in which the short range interactions are represented by Born-Mayer potentials. The relaxation in the su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0cbd33b46eac6f8a9c5af2d800b3783
https://doi.org/10.1016/0039-6028(93)90268-o
https://doi.org/10.1016/0039-6028(93)90268-o
Publikováno v:
Physical Review B. 48:10143-10152
We present a lattice-dynamical treatment of ${\mathrm{Nd}}_{2}$${\mathrm{CuO}}_{4}$ (T' structure) in the framework of a shell model that is based on short-range overlap and long-range Coulomb potentials, and includes ionic polarizabilities. We have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60812c5c09d8f5c09f5b67e19de9401c
https://doi.org/10.1103/physrevb.48.10143
https://doi.org/10.1103/physrevb.48.10143
Publikováno v:
Europhysics Letters (EPL). 23:427-432
In addition to the already known softening of the lowest transverse optic mode (TO) in KTa1 - x Nbx O3 a pronounced temperature dependence of the transverse acoustic (TA) mode in the [100] direction of the Brillouin zone has been observed by inelasti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb5660bb9aa2f065e07f84d0db888560
https://doi.org/10.1209/0295-5075/23/6/008
https://doi.org/10.1209/0295-5075/23/6/008
Publikováno v:
Journal of Physics: Condensed Matter. 5:5401-5410
The authors have treated the relaxation and the dynamics of the (111) surfaces of the fluorides CaF2 and SrF2 in the framework of shell models, in which the short-range interactions are represented by Born-Mayer potentials. The relaxation in the oute
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f06c9635f37da45a2877897f1e9a4ec
https://doi.org/10.1088/0953-8984/5/31/005
https://doi.org/10.1088/0953-8984/5/31/005
Publikováno v:
Journal of Physics: Condensed Matter. 5:1-12
The authors discuss the relaxation, reconstruction and dynamics of both (001) surfaces of SrTiO3 (SrO and TiO2 surfaces) in the framework of shell models. The treatment of the SrO surface (surface I) on the basis of a bulk shell model leads to relaxa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b011e0374a5cc16b35849563ad42b56
https://doi.org/10.1088/0953-8984/5/1/003
https://doi.org/10.1088/0953-8984/5/1/003
Publikováno v:
Physics of Narrow Gap Semiconductors ISBN: 9783540111917
The lattice dynamics of semiconducting IV–VI compounds are treated on the basis of a three dimensional highly non-linear shell model. Two different types of exact solutions are obtained from this model which are phonons and non-linear periodic exci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce7ff3439f367df0a751ab6a04582261
https://doi.org/10.1007/3-540-11191-3_42
https://doi.org/10.1007/3-540-11191-3_42