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arXiv 0710.3463cond-mat.str-el
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扩展玻色子哈伯德模型中的超固相

Supersolid phases in the extended boson hubbard model

Kwai-Kong Ng, Y. C. Chen

摘要:

本文对具有最近($V_1$)和次近邻($V_2$)排斥的二维硬核玻色子扩展哈伯德模型的基态相图进行了全面的数值研究。除了量子固体和超流相,我们报告的条纹超固体和四分之三(四分之一)填充超固体的存在相称的密度$ρ=0.75$(0.25)由于$V_1$和$V_2$相互作用的相互作用。四分之三填充的超固体和相关的量子固体的性质将被讨论。观察到两种不同对称性的超固体之间的量子相变,并且明显是一级相变。

英文摘要:

We present a comprehensive numerical study on the ground state phase diagram of the two-dimensional hardcore boson extended Hubbard model with nearest ($V_1$) and next nearest neighbor ($V_2$) repulsions. In addition to the quantum solid and superfluid phases, we report the existence of striped supersolid and three-quarter (quarter) filled supersolid at commensurate density $ρ=0.75$ (0.25) due to the interplay of $V_1$ and $V_2$ interactions. The nature of three-quarter filled supersolid and the associated quantum solid will be discussed. Quantum phase transition between the two supersolids of different symmetries is observed and is clearly of first order.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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