Programme

P.81 -- Poster, VCTP-45

Date: Wednesday, 14 October 2020

Time: 08:30 - 10:00

Online presentation

The possibility of supersolid phase in the hard-core boson model on the triangular lattice

Oanh K. T. N (1,2), Phong H. N (3), Long D. D (3), Cong T. B (3) and Giang H. B (3)

(1) Electric Power University, Hanoi, Vietnam (2) VNU University of Engineering and Technology, Hanoi, Vietnam. (3) VNU University Hanoi University of Science, Hanoi, Vietnam.

Supersolid is an unusual phase in which crystalline and superfluidity properties coexist simultaneously. The search for a supersolid phase in a natural crystal has just brought frustration and disappointment over the past decades. In recent years, the signal of a stripe supersolid phase observed booming on the optical lattice experiments with BEC have rekindled excitement for this hot topic. Intriguing by these positive expressions, we have explored the extended Bose- Hubbard model for hard-core boson on the triangular lattice in the cases of the nearest-neighbor and long-range interactions are taken account. By using the mean-field method, the phase diagrams were sketched. Notably, the supersolid exists in the middle of solid phases corresponding to densities \rho$ = 1/3 and 2/3. Simultaneously, as the nearest -neighbor interaction V1 increases, the region of the supersolid phase gradually broadens.

Presenter: Nguyen Oanh

Presentation file: