Zobrazeno 1 - 10
of 398
pro vyhledávání: '"J. Sólyom"'
Publikováno v:
Advances in Condensed Matter Physics, Vol 2015 (2015)
We study the momentum distribution of the electrons in an extended periodic Anderson model, where the interaction, Ucf, between itinerant and localized electrons is taken into account. In the symmetric half-filled model, due to the increase of the in
Externí odkaz:
https://doaj.org/article/9d0d12fc80564fa7bdadd258e0dda4db
Akademický článek
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Publikováno v:
Physical Review B. 56:14449-14455
We have considered the properties of anisotropic two-leg ladder models with S=1/2 or S=1 spins on the rungs, using White's density matrix renormalization group method. We have generalized the method by taking into account the symmetries of the model
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4326f922766905f1cef688b9e7321f55
https://doi.org/10.1103/physrevb.56.14449
https://doi.org/10.1103/physrevb.56.14449
Publikováno v:
Acta Physica Polonica A. 85:371-375
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::881045681c44bf2684b60e69917e8430
https://doi.org/10.12693/aphyspola.85.371
https://doi.org/10.12693/aphyspola.85.371
We investigate an extended version of the periodic Anderson model (the so-called periodic Anderson-Hubbard model) with the aim to understand the role of interaction between conduction electrons in the formation of the heavy-fermion and mixed-valence
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e53040dff7c7a042cab02c2185462219
http://arxiv.org/abs/1106.4999
http://arxiv.org/abs/1106.4999
We revisit the phase diagram of the frustrated s=1/2 spin ladder with antiferromagnetic rung and diagonal couplings. In particular, we reexamine the evidence for the columnar dimer phase, which has been predicted from analytic treatment of the model
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc9c7a09b744436298bac6ad15404b59
Autor:
J. Sólyom, P. Santini
Publikováno v:
Physical Review B. 46:7422-7426
The ``Kondo-necklace'' model is studied by exact numerical diagonalization on finite chains up to N=12 sites. The gap extrapolated to infinite systems can be well fitted by a Kosterlitz-Thouless-like form with a critical coupling (J/W${)}_{\mathit{c}
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a25afedc7cc9b76406b3867acaa65cc
https://doi.org/10.1103/physrevb.46.7422
https://doi.org/10.1103/physrevb.46.7422
Publikováno v:
Physical Review B. 78
We investigate the half-filled Hubbard chain with additional nearest- and next-nearest-neighbor spin exchange, J1 and J2, using bosonization and the density-matrix renormalization group. For J2 = 0 we find a spin-density-wave phase for all positive v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68b934e97243a2312003839de6354d88
https://doi.org/10.1103/physrevb.78.085128
https://doi.org/10.1103/physrevb.78.085128
Autor:
J. Sólyom
Publikováno v:
Lecture Notes in Physics ISBN: 9783540092414
A review is given of the properties of the 1-d Fermi gas model and its relationship to a series of other models including 1-d and 2-d spin models, field theoretical models and the 2-d Coulomb plasma.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c33b932bf92fb7fc75c786d480512ed9
https://doi.org/10.1007/3-540-09241-2_3
https://doi.org/10.1007/3-540-09241-2_3
Publikováno v:
Physical Review B. 77
The one-dimensional repulsive $\mathrm{SU}(n)$ Hubbard model is investigated analytically by bosonization approach and numerically using the density-matrix renormalization-group method for $n=3$, 4, and 5 for commensurate fillings $f=p∕q$, where $p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66e94c7ae89895950acaf8e1f4a7accb
https://doi.org/10.1103/physrevb.77.045106
https://doi.org/10.1103/physrevb.77.045106