查询词典 Fermi

In superconductors, the bosons are the pairs of bound electrons thAT form AT the Fermi surface

在超导体中，玻色子是在费密表面形成的束缚态电子对。

De Broglie was his thesis advisor; he served as a research assistant to Fermi ; and he worked at CERN when it was still in Copenhagen under the direction of Bohr .

他曾与诺贝尔奖得主德布罗意、费米和波尔共事，他的导师是德布罗意，他做过费米的研究助手，当CERN还在哥本哈根的时候他曾在那里在波尔的指导下工作。

B Consider the thermodynamic potential using the particle-hole oscillator representation. We are going to check if it gives the same result as the canonical Fermi representation.

利用粒子-空穴振荡表象考虑热力学势，我们要检验它是否能给出正则费米表象一样的结果。

The nuclear reactions in the initial study, the discovery of the neutron in 1932 and in 1934 the synthesis of artificial radionuclides is a representative The results of .40 before and after the age of nuclear physics has entered a phase of great development .1939, the Hahn and Strassman found that the phenomenon of nuclear fission in 1942, Fermi established the first fission chain reactor, which is human with nuclear energy start.

在初期的核反应研究中，1932年中子的发现和1934年人工放射性核素的合成是具有代表性的成果。40年代前后，核物理进入一个大发展阶段。1939年，哈恩和斯特拉斯曼发现核裂变现象，1942年，费米建立了第一个链式裂变反应堆，这是人类掌握核能源的开端。

This book analyzes, from a single perspective, some of the most important applications: the critical-point theory in classical statistical mechanics, the scalar quantum field theories in two and three space-time dimensions, and Tomonaga's theory of the ground state of one-dimensional Fermi systems.

这本书分析，从一个单个的视角，一些最重要的应用：在经典统计力学方面的临界点理论，标量量领域理论在2 和3 空间时间维，和Tomonaga 一维费密系统的基态的理论方面。

In addition, some modifications on several computational methods are also presented. Using LMTO method the electronic structure of several systems are studied, and some results are obtained. They are: The ideal Nb (100) surface has three surface states, the multi-layer relaxed surface has two surface states. The surface energy of the ideal surface is higher than that of the relaxed surface, that means that the multi-layer relaxed surface is more stable than the former one, which supports the LEED results. The mono-layer relaxed Ag (111) surface is the most stable one among several" stable surface models"presented by several researchers. The surface energy of Ag (111) surface is higher than that of surface Ag (001), which supports some experimental results such as different reaction rate at different surface orientations for the same material. The surafce states of Si (111) surface not only locate near the Fermi level, but also in the valence band, which agrees well with Cohen's conclusion. Si (111)-H is an effective model for analysing the surface states and H adsorbed on the back surface is a good method for improving the convincingness of the results obtained on thinner slab models. The surface stability depends on three different kinds of MoSi〓(001) surfaces, the surface with mono-layer Si is the most stable one, and the surface with Mo at the first layer is the most unstable one among them. These are consistant with the Kemoda's experimental results. The valence bands of clean or K adsorbed CdTe (111) surface agrees well with the synchrotron radiation studies. The surface of CdTe (111) consists of four kinds of surface models which show different surface electronic structures and different surface structure stabilities. The conclusion agrees well with Wu's experimental work. The different absorbed alkali metals on the CdTe (111) surface give different adsorption characteristics which have relations not only with the valence electrons, but also with the core ones of the alkali metals. The electonic structures of Si-C alloys are different from that of Si-Ge alloys, and the energy band gaps of Si-C alloys do not increase linearly with Carbon concentration, our conclusion supports Alexander's results, but conflicts with Soref's one.

现分述如下： LMTO方法及其应用方面：1）通过对Nb（100）表面电子态分析发现清洁理想表面有三个表面态，多层弛豫表面有两个表面态；表面能大小说明多层弛豫表面更稳定，支持了LEED结果。2）通过对采用不同方法获得的几种不同Ag（111）表面稳定结构的表面能计算分析，给出了单层弛豫表面为Ag（111）表面的最稳定结构；从Ag（111）单层弛豫表面和Ag（001）表面的表面能比较，发现了Ag（001）表面表面能要比Ag（111）小的，表明了同种物质不同表面取向将表现出不同物理、化学性质，这是与实验中得出的结论是吻合的，3）通过对Si（111）表面态分析，不仅发现了Si（111）表面不仅具有居于费米能级附近的悬挂键所对应的表面态，而且还有很多表面态位于价带能量范围内，与Cohen等结果一致，H饱和slab模型背表面相当于增加了slab层的厚度，是一有效的变相增加slab层厚的方法，弛豫表面较清洁理想表面价带谱们低能端的少许移动，预示着总能降低，说明弛豫表面较清洁理想表面稳定。4）MoSi〓具有三种表面，从费米能级上态密度值大小得到单层Si表面最稳定，Mo原子为表层原子的表面最不稳定，双层Si原子表面居中的结论，这与Kemoda等人实验结果是一致的。5）通过对CdTe（111）表面表面电子态、表面结构稳定性及表面H、碱金属吸附的电子结构系列研究，不仅得出了CdTe（111）清洁及碱金属K吸附价带谱与同步辐射光电子谱相吻合的结果，而且发现了CdTe（111）表面具有四类不同原子近邻特征，表现出四类不同的表面结构及电子结构特征：不同表面态分布、不同的表面结构稳定性（表层原子与次层原子成三键有一悬挂键的表面要比表层原子与次层原子成一键有三悬挂键稳定（与Wu等人实验结果一致））、不同的H吸附特性。

Using the method of Fermi-Dirac distribution, we can consider the Coulomb blockade in the quantum dot. This work is in progress at present.

而利用费米-狄拉克分布的方法可以考虑到量子点中能级之间的相互作用，这是目前正在进行的工作。

Hall coefficient was found to be weakly dependent on temperature, but shows no evidence of magnet field dependence, indicating that the Fermi Surface is not much complicated by its interaction with the quasi-Brillouin zone boundary in the AlCuCo decagonal quasicrystal.

发现霍耳系数对温度只有微弱的依赖性，与磁场几乎无关，这表明在与准布里渊区的作用中，费米面的结构没有变得非常复杂。

The particle density criterion and the temperature criterion of instability for the imperfect Fermi gas with weakly attractive interaction are given, and the dependance of the critical density of particles on the temperature...

给出了不稳定性的粒子数密度判据和温度判据，就不同逸度情况下临界粒子数密度的具体表达结果以及温度、粒子质量和吸引相互作用对临界粒子数密度的影响进行了讨论。

Calculated results showed that in the Ni2MnIn phase, the atomic orbital magnetic moment of Mn dominates the unit cell's magnetic moment, i. e., about 85% of the total magnetic moments of unit cells. The contribution of Ni to the total cell's magnetic moments is about 15%. As to the In atoms, they show a weak diamagnetism in both phases. In particular, the phase transformation of tetragonal martensite results in the decrease in Fermi energy of Ni2MnIn unit cells by 0.495 eV.

计算表明：四方马氏体相变导致Ni2MnIn元胞费米能下降0.495eV；Ni2MnIn结构中，In原子具有弱抗磁性，晶胞磁矩为Mn原子轨道磁矩所主导，约占元胞总轨道磁矩85%，Ni原子轨道磁矩贡献约占元胞总轨道磁矩15%。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。