etidronate 发表于 2025-3-23 13:21:37

Magnetic Properties of the Hubbard Model with Infinite Interactionsegments of length . (an .-chain model). It is shown that the total spin of the ground state grows from 0 to .. with an increase of electron density .. For two-chain model the critical value .. is found, above which the ground state is ferromagnetic. For .-chain model with . > 2 a “cascade” of the tr

愚笨 发表于 2025-3-23 14:49:32

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ORE 发表于 2025-3-23 18:24:23

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Invertebrate 发表于 2025-3-24 01:44:55

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averse 发表于 2025-3-24 05:25:44

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reserve 发表于 2025-3-24 07:10:52

Christa Albrecht,Gertrud-Elisabeth BoniferNonlinear optical properties of (A – B).-polymers axe studied in the noninteracting electron approximation. Using a Keldysh Green function method there was calculated the nonlinear susceptibility of the third harmonic generation as well as nonlinear index of refraction. It was shown that the second order susceptibilities are equal to zero.

离开真充足 发表于 2025-3-24 14:27:48

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jarring 发表于 2025-3-24 17:32:26

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glamor 发表于 2025-3-24 20:47:46

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牵索 发表于 2025-3-25 01:26:45

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查看完整版本: Titlebook: Electron-Electron Correlation Effects in Low-Dimensional Conductors and Superconductors; Alexandr. A. Ovchinnikov,Ivan I. Ukrainskii Confe