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Fermi pressure

It is noteworthy that these activity coefficients are larger than 1 and lead to an increased activity (cf. Fermi pressure) (see Fig. 21). The opposite is true for a Bose-Einstein statistics (f c = (1 + x ) 1 instead of Eq. (65), cf. Bose condensation). [Pg.47]

Truscott AG, Strecker KE, McAlexander Wl, Partridge GB, Hulet RG. (2001) Observation of Fermi pressure in a gas of trapped atoms. Science 291 2570. [Pg.428]

Compare the Fermi pressure and the tendency to Bose condensation [99]. [Pg.80]

It is well known that the energy profiles of Compton scattered X-rays in solids provide a lot of important information about the electronic structures [1], The application of the Compton scattering method to high pressure has attracted a lot of attention since the extremely intense X-rays was obtained from a synchrotron radiation (SR) source. Lithium with three electrons per atom (one conduction electron and two core electrons) is the most elementary metal available for both theoretical and experimental studies. Until now there have been a lot of works not only at ambient pressure but also at high pressure because its electronic state is approximated by free electron model (FEM) [2, 3]. In the present work we report the result of the measurement of the Compton profile of Li at high pressure and pressure dependence of the Fermi momentum by using SR. [Pg.334]

R. J. Hemley and H. K Mao, Overview of static high pressure science, in High Pressure Phenomena, Proceedings of Ihe International School of Physics Enrico Fermi, Course CXLVII, R. J. Hemley, G. L. Chiarotti, M. Bemasconi, and L. Ulivi, eds. lOS Press, Amsterdam, 2002, p. 3. [Pg.223]

We see that the adsorptivity of the surface with respect to molecules of a given kind, i.e., the total number of molecules of this kind N bound to unit surface under conditions of equilibrium with the gaseous phase (i.e., at given pressure P and temperature T) depends on the position of the Fermi level. By shifting the Fermi level (other conditions being fixed), one can vary the adsorptivity of the surface. [Pg.213]

Ohmichi E, Ito H, Ishiguro T, Komatsu T, Saito G (1998) Pressure dependence of magnetoresistance and Fermi surface of (BEDT-TTF)2Cu2(CN)3. Rev High Pressure Sci Technol 7 ... [Pg.125]

The f-band width was found to be about 5 eV in Ac, about 3 eV for Th-Np and around 2 eV for Pu. In Am it is down to 1 eV. The Stoner parameter, was calculated to be about 0.5 eV and almost constant throughout the series. At Am, however, the product I N(Ef) of the Stoner parameter and the f-density of states at the Fermi level exceeds one and spontaneous spin polarization occurs in the band calculation. Since Am has about 6.2 f-electrons and the moment saturates, this leads to an almost filled spin-up band and an empty spin-down band. The result is that the f-pressure all but vanishes leading to a large jump in atomic volume - in agreement with experiment. This has been interpreted as Mott-localization of the f-electrons at Am and the f-electrons of all actinides heavier than Am are Mott-localized. The trend in their atomic volumes is then similar to those of the rare earths. [Pg.281]

An early success of quantum mechanics was the explanation by Wilson (1931a, b) of the reason for the sharp distinction between metals and non-metals. In crystalline materials the energies of the electron states lie in bands a non-metal is a material in which all bands are full or empty, while in a metal one or more bands are only partly full. This distinction has stood the test of time the Fermi energy of a metal, separating occupied from unoccupied states, and the Fermi surface separating them in k-space are not only features of a simple model in which electrons do not interact with one another, but have proved to be physical quantities that can be measured. Any metal-insulator transition in a crystalline material, at any rate at zero temperature, must be a transition from a situation in which bands overlap to a situation when they do not Band-crossing metal-insulator transitions, such as that of barium under pressure, are described in this book. [Pg.1]


See other pages where Fermi pressure is mentioned: [Pg.518]    [Pg.397]    [Pg.215]    [Pg.518]    [Pg.397]    [Pg.215]    [Pg.84]    [Pg.61]    [Pg.522]    [Pg.144]    [Pg.288]    [Pg.73]    [Pg.73]    [Pg.89]    [Pg.264]    [Pg.511]    [Pg.229]    [Pg.38]    [Pg.46]    [Pg.1009]    [Pg.57]    [Pg.37]    [Pg.144]    [Pg.82]    [Pg.335]    [Pg.345]    [Pg.224]    [Pg.242]    [Pg.39]    [Pg.77]    [Pg.92]    [Pg.95]    [Pg.139]    [Pg.320]    [Pg.126]    [Pg.185]    [Pg.231]    [Pg.22]   
See also in sourсe #XX -- [ Pg.397 ]




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Pressure Fermi-Dirac statistics

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