2007/10/18 by Kwai-Kong Ng, Yung‐Chung Chen, Y. C. Chen · 33 citations
Physics and Astronomy · #Bose–Hubbard model #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Ground state #Phase (matter) #Phase diagram #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum mechanics #Quantum phase transition #Quantum phases #Quantum, superfluid, helium dynamics #Superfluidity #Supersolid #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.77.052506
published in Physical Review B 77(5) (American Physical Society) · 4 pages, 6 figures
arxiv created 2007/10/18 · openalex publication_date 2008/02/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present a comprehensive numerical study on the ground state phase diagram of the two-dimensional hard core bosonic extended Hubbard model with nearest (V1) and next nearest neighbor (V2) repulsions. In addition to the quantum solid and superfluid phases, we report the existence of a striped supersolid and three-quarter (quarter)-filled supersolid at commensurate density \ensuremathρ=0.75 (0.25) due to the interplay of V1 and V2 interactions. The nature of the three-quarter-filled supersolid and the associated quantum solid will be discussed. The observed quantum phase transition between the two supersolids of different symmetries is found to be first order.