Properties of extended Hubbard models with anisotropic spin-exchange interaction

• Autorzy: Czart W. R. , Robaszkiewicz S.
• Konferencja: Conference New Materials for Magnetoelectronics, Będlewo, 3-6 May 2006
• Języki publikacji: EN

Abstrakty

EN

The phase diagrams and electron orderings of the half-filled extended Hubbard models with anisotropic spin-exchange interactions are studied. The cases of ferromagnetic and antiferromagnetic exchange couplings are considered for repulsive on-site interaction (U ? 0). The analysis of these t-U-J||-J??models is performed for d-dimensional hypercubic lattices including d = 1 and d =??by means of the (broken symmetry) HFA supplemented, for d = ?, by the slave-boson mean-field method. The basic features of the derived phase diagrams are discussed.

Słowa kluczowe

EN

phase diagram; Hubbard model; anisotropic spin exchange

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2007
• Tom: Vol. 25, No. 2
• Strony: 485--489
• Opis fizyczny: Bibliogr. 7 poz.

Twórcy

autor

Czart W. R.

autor

Robaszkiewicz S.

• Division of Electronic States of Solids, Institute of Physics, Adam Mickiewicz University, ul. Umultowska 85, 61-614 Poznań, Poland

Bibliografia

• [1] JAPARIDZE G.I., MULLER-HARTMANN E., Phys. Rev. B, 61 (2000), 9019.
• [2] DZIURZIK C., JAPARIDZE G.I., SCHADSCHNEIDER A., ZITTARTZ J., Eur. Phys. J. B, 37 (2004), 453.
• [3] CZART W., ROBASZKIEWICZ S., in preparation.
• [4] CZART W., ROBASZKIEWICZ S., Phys. Stat. Sol. (b), 243 (2006), 151.
• [5] BUŁKA B., ROBASZKIEWICZ S., Phys. Rev. B, 54 (1996), 13138.
• [6] ROBASZKIEWICZ S., BUŁKA B., Phys. Rev. B, 59 (1999), 6430.
• [7] NAKAMURA M., Phys. Rev. B, 61 (2000), 16377; J. Phys. Soc. Jpn., 68 (1999), 3123.