994 resultados para Seixas, Romualdo Antonio de, 1787-1860.


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The recent advances and promises in nanoscience and nanotechnology have been focused on hexagonal materials, mainly on carbon-based nanostructures. Recently, new candidates have been raised, where the greatest efforts are devoted to a new hexagonal and buckled material made of silicon, named Silicene. This new material presents an energy gap due to spin-orbit interaction of approximately 1.5 meV, where the measurement of quantum spin Hall effect(QSHE) can be made experimentally. Some investigations also show that the QSHE in 2D low-buckled hexagonal structures of germanium is present. Since the similarities, and at the same time the differences, between Si and Ge, over the years, have motivated a lot of investigations in these materials. In this work we performed systematic investigations on the electronic structure and band topology in both ordered and disordered SixGe1-x alloys monolayer with 2D honeycomb geometry by first-principles calculations. We show that an applied electric field can tune the gap size for both alloys. However, as a function of electric field, the disordered alloy presents a W-shaped behavior, similarly to the pure Si or Ge, whereas for the ordered alloy a V-shaped behavior is observed.

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Translation of Zaïre.

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Also attributed to J. H. Lelarge de Lourdoueix. Cf. British Museum Catalogue.

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Dictionnaire général de biographie et d'histoire... / Dezobry, Bachelet

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Mode of access: Internet.

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En p. 148 consta: "Fin del Catecismo para las fiestas", y en p. 115 "Fin del Catecismo breve", con portada y paginación propias.

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Mode of access: Internet.

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An exposition of the theories of Charles Fourier.

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Mode of access: Internet.

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Includes the supplementary commentaries ascribed to Hirtius and others.

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"A. Hirtii Cominentarioriun de bello alexandrino liber: A. Hirtii De bello africano liber unus; A. Hirtii De bello hispaniensi liber": p. [295]-390.