- Tytuł:
- Phase Separation in the Ground State of the Model 2D Spin-Pseudospin System
- Autorzy:
-
Chikov, A.
Panov, Yu.
Moskvin, A.
Budrin, K. - Powiązania:
- https://bibliotekanauki.pl/articles/1030463.pdf
- Data publikacji:
- 2018-03
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
75.25.Dk
74.81.-g - Opis:
- We addressed a simplified static 2D spin-pseudospin model which takes into account both conventional Heisenberg spin exchange coupling and the on-site and inter-site charge correlations. Classical Monte-Carlo calculations for large square lattices show that homogeneous ground state solutions found in a mean-field approximation are unstable with respect to phase separation with the charge and spin subsystems behaving like immiscible quantum liquids. For instance, with lowering the temperature one can observe two sequential phase transitions: first, antiferromagnetic ordering in the spin subsystem diluted by randomly distributed charges, then, the charge condensation in the charge droplets. Thermodynamic properties and phase diagram of the 2D spin-pseudospin system are studied by Monte-Carlo simulation with a special attention given to the role played by the on-site correlation.
- Źródło:
-
Acta Physica Polonica A; 2018, 133, 3; 432-434
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł