准二维液态He-3
Quasi-2D Liquid He-3
摘要：
量子蒙特卡罗模拟在零温度下的合奏的He-3原子吸附在镁和碱金属基板上产生强有力的证据，化学稳定的液体He-3单层所有碱金属基板上，与可能的例外Li。有效的二维密度接近于0.02$ inverse square Angstrom on Na，使其成为自然界中密度最低的液体。它的存在是由垂直于衬底的零点原子运动所支撑的，其效果是软化氦原子间势的短程排斥。单层膜应该在1 mK量级的温度下变成超流体。预计在Mg或更强的基底如石墨上不会形成液膜。
英文摘要：
Quantum Monte Carlo simulations at zero temperature of an ensemble of He-3 atoms adsorbed on Mg and Alkali substrates yield strong evidence of a thermodynamically stable liquid He-3 monolayer on all Alkali substrates, with the possible exception of Li. The effective 2D density is close to 0.02$ inverse square Angstroms on Na, making it the lowest density liquid in Nature. Its existence is underlain by zero-point atomic motion perpendicular to the substrate, whose effect is softening the short-range repulsion of the helium interatomic potential. The monolayer films should turn superfluid at a temperature of order 1 mK. No liquid film is predicted to form on Mg, or on stronger substrates such as graphite.
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