Journal of Physics-Condensed Matter
We study the lasing action due to nonlinear interactions of photons with boson elementary excitation, such as phonons and excitons, and point out the distinct features from the conventional laser model described by the two-level model. External feedback by means of cavity mirrors is unnecessary fdr ...
关键词:
transition
Chinese Physics Letters
A novel compound Fe-Ta-S crystal has been obtained using iodine vapor transport technology. At low temperature this compound is in a strong diamagnetic state, which is similar to a superconductor. The dependence of the diamagnetic phase transition temperature on the magnetic field could be expressed...
关键词:
transition
Physical Chemistry Chemical Physics
Charge, orbital, and spin ordering of multiferroic BiMn(2)O(5) are investigated by the full-potential linearized augmented plane-wave (FPLAPW) method as implemented in the WIEN2K package. Both the generalized gradient approximation (GGA) as well as GGA plus the one-site Coulomb interaction (GGA+U) m...
关键词:
transition
Journal of Applied Physics
In this paper, we investigate the influence of high temperature and high pressure (hot pressure) on the magnetic and transport properties of polycrystalline CrO(2) samples compacted under high pressure and high temperature of up to 5 GPa and 600 degrees C, respectively. The magnetic moment increases...
关键词:
transition
Shuxian CHEN
材料科学技术（英文）
The flow and heat transfer of molten GaAs under the interaction of buoyancy, Marangoni and crystal rotation in the Czochralski configuration are numerically studied by using a time-dependent and three-dimensional turbulent flow model for the first time. The transition from axisymmetric flow to non-a...
关键词:
Flow transition
,
transition
,
baroclinic
,
instability
Chinese Physics Letters
Measurements of the Hall coefficient (R(H)) were carried out for a polycrystalline YBa2Cu3O7-y film, a well oriented YBa2Cu3O7-y film and an oriented GdBa2Cu3O7-y film. Sign change of R(H) was observed for the two YBa2Cu3O7-y films near T(c), but not for the GdBa2Cu3O7-y film which contains partly t...
关键词:
transition
Journal of Physics-Condensed Matter
In this paper we establish the high-order perturbation formulas of zero-held splittings D and E and g factors g(x), g(y) and g(z) for 3d(3) ions in rhombic symmetry by using a two-spin-orbit (SO) coupling parameter model, in which not only the contribution due to the SO coupling of the central 3d(3)...
关键词:
transition
G.Q. Liu
,
Y.Y. Meng
,
S.H. Liu
,
Y.H. Hu
金属学报(英文版)
DNA takes on multi-different conformations such as A-, B-, C-, D- and Z-form. These conformations can transit to one another when DNA deposited in some metal ions solutions or when changing the concentrations of the same metal ions. Here, several major conformational transitions of DNA induced by me...
关键词:
DNA
,
null
,
null
周婷婷
,
马书懿
,
毛雷鸣
,
丁继军
,
史新福
功能材料
采用射频磁控溅射在玻璃衬底上制备了不同掺杂量的Fe-ZnO薄膜,分析不同掺杂量对薄膜光学性能的影响.利用X射线衍射仪(XRD)和原子力显微镜(AFM)研究Fe-ZnO薄膜的微观结构和形貌结构.Fe-ZnO薄膜光致发光(PL)性质的研究发现,发光峰主要有蓝光发射和绿光发射,蓝光发射主要是由于电子从导带...
关键词:
掺杂
,
光致发光
,
跃迁
,
透射
林立
,
任静
,
蒋洪德
工程热物理学报
燃气轮机内部通流冷却叶片的流动传热特性对于燃机的整体效率有着重要的影响,而叶片表面的转捩流场一直是阻碍对叶片冷却性能进行精确分析的主要因素.本文采用SST湍流模型及γ-Re_θ转捩模型对MARK Ⅱ叶型进行数值模拟,通过分析叶栅通道内传热特性以考察该转捩模型的适应性,肯定了该转捩模型对于湍流边界层发...
关键词:
转捩
,
燃气轮机
,
耦合传热
,
内部通流冷却
,
数值模拟
