排序方式: 共有31条查询结果,搜索用时 0 毫秒
21.
A procedure is explained to determined the amount of several pairs of diametrical loads applied to the outside boundary of
a ring when stresses at selected points of the inside or outside boundaries are known. Coefficients of influence are used,
following an approach similar to the one presented in a previous paper. Examples of application are given and the possible
increase in precision is shown when the number of points of measurements is larger than the number of loads to be determined. 相似文献
22.
Guarise M Dalla Piazza B Moretti Sala M Ghiringhelli G Braicovich L Berger H Hancock JN van der Marel D Schmitt T Strocov VN Ament LJ van den Brink J Lin PH Xu P Rønnow HM Grioni M 《Physical review letters》2010,105(15):157006
We measured the momentum dependence of magnetic excitations in the model spin-1/2 2D antiferromagnetic insulator Sr2CuO2Cl2 (SCOC). We identify a single-spin-wave feature and a multimagnon continuum, with different polarization dependences. The spin waves display a large (70 meV) dispersion between the zone-boundary points (π, 0) and (π/2, π/2). Employing an extended t-t'-t'-U one-band Hubbard model, we find significant electronic hopping beyond nearest-neighbor Cu ions, indicative of extended magnetic interactions. The spectral line shape at (π, 0) indicates sizable quantum effects in SCOC and probably more generally in the cuprates. 相似文献
23.
ThomasD. Schladt MohammedIbrahim Shukoor Kerstin Schneider MuhammadNawaz Tahir Filipe Natalio Irene Ament Jan Becker FlorianD. Jochum Stefan Weber Oskar Khler Patrick Theato LauraMaria Schreiber Carsten Snnichsen HeinzC. Schrder WernerE.G. Müller Wolfgang Tremel 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2010,122(23):4068-4072
24.
25.
26.
27.
28.
Thomas D. Schladt Mohammed Ibrahim Shukoor Dr. Kerstin Schneider Muhammad Nawaz Tahir Dr. Filipe Natalio Irene Ament Jan Becker Florian D. Jochum Stefan Weber Oskar Köhler Patrick Theato Dr. Laura Maria Schreiber Prof. Dr. Carsten Sönnichsen Prof. Dr. Heinz C. Schröder Prof. Dr. Dr. Werner E. G. Müller Prof. Dr. Wolfgang Tremel Prof. Dr. 《Angewandte Chemie (International ed. in English)》2010,49(23):3976-3980
29.
30.