QUANTUM LATTICE GAS AND EXISTENCE OF A SUPERSOLID
QUANTUM LATTICE GAS AND EXISTENCE OF A SUPERSOLID
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DOI：
10.1007/bf00655458
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发表时间：
1973-01-01
影响因子：
2
通讯作者：
FISHER, ME
中科院分区：
文献类型：
--
作者：
LIU, KS;FISHER, ME
我们讨论，在平均场理论，可能的相图的量子晶格气体模型（考虑由松田和常户atT=0），特别是参考超固相的存在，显示远程对角（或结晶）秩序和远程非对角秩序（作为超流体的特征）。对于参数范围提供了一个合理的表示已知的相图of4He，我们表明，超固相之间可能会出现通常的固体和超流相。然而，这样的阶段可能不会延伸到绝对零度。
We discuss, within mean field theory, the possible phase diagrams of a quantum lattice gas model (as considered by Matsuda and Tsuneto atT=0) with particular reference to the existence of a supersolid phase, displaying both long-range diagonal (or crystalline) order and long-range off-diagonal order (as characteristic of a superfluid). For parameter ranges which provide a reasonable representation of the known phase diagram of4He, we show that a supersolid phase may appear between the usual solid and superfluid phases. Such a phase might not, however, extend down to absolute zero.