Czasopismo
Tytuł artykułu
Autorzy
Warianty tytułu
Języki publikacji
Abstrakty
We have calculated the spectral function and density of states of halffilled two-dimensional Hubbard model in the Hubbard-I approximation assuming an antiferromagnetic long range order at low temperature and compared results to the QMC data. It occurs that calculated functions are in a qualitative agreement with the QMC one. We have also shown that Neel ordered state dispersion has the similar form to the spin density wave one.
Czasopismo
Rocznik
Tom
Numer
Strony
421-431
Opis fizyczny
Daty
wydano
2003-09-01
online
2003-09-01
Twórcy
autor
- L. V. Kirensky Institute of Physics, Siberian Division, Russian Academy of Science, Akademgorodok, 660036, Krasnoyarsk, Russia
autor
- L. V. Kirensky Institute of Physics, Siberian Division, Russian Academy of Science, Akademgorodok, 660036, Krasnoyarsk, Russia, shneyder@iph.krasn.ru
Bibliografia
- [1] J.C. Hubbard: “Electron correlations in narrow energy bands”, Proc. Roy. Soc. London, Vol. A 276, (1963), pp. 238. http://dx.doi.org/10.1098/rspa.1963.0204[Crossref]
- [2] P.O. Zaitsev: “Diagram technique and gas approximation in the Hubbard model”, JETP, Vol. 70, (1976), pp. 1100.
- [3] V.V. Val'kov and S.G. Ovchinnikov: Quasiparticles in strongly correlated systems, Siberian Branch of Russian Academy of science, Novosibirsk, 2001.
- [4] C. Grober, R. Eder, W. Hanke: “Anomalous low-doping phase of the Hubbard model”, Phys. Rev.B, Vol. 62, (2000), pp. 4336. http://dx.doi.org/10.1103/PhysRevB.62.4336[Crossref]
- [5] D.N. Zubarev, “Two-time temperature dependent Green function method in the statistic thermodynamics”, Usp. Fiz. Nauk, Vol. 71, (1960), pp. 71.
- [6] J.C. Hubbard: “Electron correlations in narrow bands. An improved solution”, Proc. Roy. Soc., Vol. A 277, (1964), pp. 237.
- [7] C. Castellany, C. Di Castro, D. Feinberg, J. Ranniger: “New model hamiltonian for the metal-insulator transition”, Phys. Rev. Let., Vol. 26, (1979), pp. 1957. http://dx.doi.org/10.1103/PhysRevLett.43.1957[Crossref]
- [8] N. Bulut, D. J. Scalapino, S.R. White: “Electronic Properties of the Insulating Half-Filled Hubbard Model”, Phys. Rev. Let., Vol. 73, (1994), pp. 748. http://dx.doi.org/10.1103/PhysRevLett.73.748[Crossref]
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_BF02475853