Heat-capacity study of the second layer ofHe3adsorbed on Grafoil
Heat-capacity study of the second layer ofHe3adsorbed on Grafoil
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Grafoil吸附第二层He3的热容研究
DOI：
10.1103/physrevb.18.285
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发表时间：
1978
影响因子：
3.7
通讯作者：
O. Vilches
中科院分区：
文献类型：
--
作者：
S. V. Sciver;O. Vilches
吸附的He 3的热容测量报告。研究的密度开始略低于单层完成，并上升到略高于第二层完成。温度范围为0.04K < T<4.2K。从第一层（固体）的贡献的计算值减去后，和解吸，我们发现，第二层的行为作为一个二维相互作用的费米气体在所有密度的部分第三层不存在。第二层气体不能用与第一层相同的第二维里系数来表示。衬底诱导的有序转变的情况下，允许一个研究的气体行为在一个更大的范围内的密度比第一层。我们发现，形状，温度和密度依赖的非常低的温度（10.1 K）圆形异常的比热是不同于第一层。在存在非常少量的第三层的情况下，第二层在低于0.98K的温度下固化。
Heat-capacity measurements on adsorbed He 3 are reported. The densities studied start slightly under monolayer completion and go up to slightly above second-layer completion. The temperature range is 0.04 K< T< 4.2 K. After subtraction of calculated values of the contributions from the first layer (solid), and desorption, we find that the second layer behaves as a two-dimensional interacting Fermi gas at all densities for which a partial third layer is not present. The second-layer gas cannot be represented by the same second virial coefficient used for the first layer. The absence of the substrate-induced ordering transition allows one to study the gas behavior over a larger range of densities than on the first layer. We find that the shape, temperature, and density dependence of the very low temperature (∼ 0.1 K) rounded anomaly in the specific heat is different than on the first layer. With a very small amount of third layer present, the second layer solidifies for temperatures below 0.98 K.