Ground state properties of soft core bosons on a two-dimensional honeycomb lattice
We study the ground state properties of interacting bosons on a 2 dimensional honeycomb lattice using SSE QMC simulations with directed loop update. We pay particular attention to the supersolid phase. At maximum occupancy of 2 bosons per site, we observe a ρ = 1/2 solid which undergoes a continuous...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
2012
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| Online Access: | http://hdl.handle.net/10356/49100 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | We study the ground state properties of interacting bosons on a 2 dimensional honeycomb lattice using SSE QMC simulations with directed loop update. We pay particular attention to the supersolid phase. At maximum occupancy of 2 bosons per site, we observe a ρ = 1/2 solid which undergoes a continuous phase transition to a superfluid. At higher chemical potential, the superfluid condenses at continuous transition into a Mott insulator. There is no supersolid observed. At maximum occupancy of 6 bosons per site, we find a wide but narrow region of ρ <1 supersolid which later melts at continuous transition to a superfluid which later on condenses into a Mott insulator at higher chemical potential |
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