| Autor: |
de Parny, L. de Forges, Hébert, F., Rousseau, V. G., Batrouni, G. G. |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Phys. Rev. B 88, 104509 (2013) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.88.104509 |
| Popis: |
We study, using quantum Monte Carlo (QMC) simulations, the ground state properties of spin-1 bosons trapped in a square optical lattice. The phase diagram is characterized by the mobility of the particles (Mott insulating or superfluid phase) and by their magnetic properties. For ferromagnetic on-site interactions, the whole phase diagram is ferromagnetic and the Mott insulators-superfluid phase transitions are second order. For antiferromagnetic on-site interactions, spin nematic order is found in the odd Mott lobes and in the superfluid phase. Furthermore, the superfluid-insulator phase transition is first or second order depending on whether the density in the Mott is even or odd. Inside the even Mott lobes, we observe a singlet-to-nematic transition for certain values of the interactions. This transition appears to be first order. |
| Databáze: |
arXiv |
| Externí odkaz: |
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