首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
Received: 25 September 1998 / Accepted: 25 November 1998 / Published online: 24 February 1999  相似文献   

3.
4.
5.
Electronic structure calculations of the alkali bromides LiBr, NaBr, KBr, RbBr and CsBr are reported. It is shown that the conduction band has primarily bromine character. The size of the band gaps of bromides and alkali halides in general is reinterpreted. Received: 26 January 1998 / Revised: 16 March 1998 / Accepted: 23 March 1998  相似文献   

6.
7.
8.
We investigate by Monte-Carlo simulation the linear response function of three dimensional structural glass models defined by short-range kinetic constraints and a trivial equilibrium Boltzmann-Gibbs measure. The breakdown of the fluctuation-dissipation theorem in the glassy phase follows the prediction of mean field low temperature mode-coupling theory. Received: 24 April 1998 / Received in final form: 8 May 1998 / Accepted: 11 May 1998  相似文献   

9.
10.
Received: 13 October 1998 / Accepted: 9 December 1998 / Published online: 24 February 1999  相似文献   

11.
12.
13.
14.
We find that there exists an elementary topological current in Bose-Einstein condensation. Based on the -mapping topological current theory, the implicit function theorem and the Taylor expansion, the topological structure of vortex lines is detailed in the neighborhoods of the bifurcation points of the condensate wave function. Received: 9 April 1998 / Revised: 28 August 1998 / Accepted: 31 August 1998  相似文献   

15.
14 cm-3 in FZ-Si was obtained. Received: 2 June 1998 / Accepted: 20 November 1998 / Published online: 24 February 1999  相似文献   

16.
17.
18.
Etalon effect in wave-mixing experiments with photorefractive crystals   总被引:1,自引:0,他引:1  
We present investigations of the etalon effect in sillenite photorefractive crystals with a pulsed frequency-doubled Nd:YAG laser and show its influence on two- and four-wave mixing. In four-wave mixing the etalon effect allows changes of the diffraction efficiency by more than 80%. Results are supported by theoretical considerations. Received: 15 April 1998/Revised version: 19 June 1998  相似文献   

19.
′ -hydroxy-5-methylphenyl)-benzotriazole. Received: 2 June 1998/Revised version: 31 July 1998  相似文献   

20.
Structural relaxation in liquid orthoterphenyl is studied by means of coherent neutron time-of-flight and backscattering spectroscopy over a large temperature range. Not only amplitude and relaxation time but also the spectral line shape show a significant variation with wavenumber. These variations are correlated with the static structure factor, in qualitative accord with mode-coupling results for simple liquids. Even far above the melting point, relaxation remains non-exponential. Received: 5 January 1998 / Revised: 3 April 1998 / Accepted: 19 June 1998  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号