Autor: Spalek, R. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Kondo-Lattice Metals and Semiconductors with Compensated Magnetic Moments: a Brief Overview
Autorzy:: Spałek, J.
Doradziński, R.
Powiązania:: https://bibliotekanauki.pl/articles/2011147.pdf
Data publikacji:: 1999-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.27.+a
71.10.Fd
75.30.Mb
Opis:: We provide a brief overview of recent theoretical results concerning the metallic and insulating states with very heavy quasiparticle masses and almost compensated magnetic moments, primarily in the antiferromagnetic state. The temperature dependence of the Kondo-insulator band gap is also discussed.
Źródło:: Acta Physica Polonica A; 1999, 96, 5; 677-688
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Correlation Induced Optimization of Wave Functions: the Hubbard Chain
Autorzy:: Spałek, J.
Podsiadły, R.
Wójcik, W.
Powiązania:: https://bibliotekanauki.pl/articles/2013007.pdf
Data publikacji:: 2000-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.10.Fd
71.15.Fv
31.25.Nj
Opis:: We determine the explicit form of the single-particle Wannier functions {w$\text{}_{i}(r)}$ appearing in the parameters of quantum models. The method is illustrated on the example of the Hubbard chain, for which we derive the renormalized wave equation starting from a variational principle and by treating the system ground state energy as a functional of {w$\text{}_{i}(r)}$ and their derivatives. In this manner, the optimized basis is obtained only after the electronic correlations have been included in the rigorous Lieb-Wu solution. The results for the ground state energy and the size of the renormalized s-type orbitals, both as a function of interatomic distance, are calculated explicitly.
Źródło:: Acta Physica Polonica A; 2000, 97, 3; 381-384
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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