Study for quantum condensed phases of one-and 2-dimensional helium 3 fluids

通过测量温度降至0℃时的吸附压力，研究了氦-4在直径约18A的一维孔上的吸附。5K，压力精度在0。1Pa.从压力数据中，我们得到了吸附能和可压缩性的覆盖率关系。结果表明，孔壁上至第二层为逐层形成。根据3He和4He热容的同位素效应和扭振子的超流体观测，发现2^&lt；nd&gt；层为玻色流体。第二层的4He热容有一个温度线性项，它被理解为第二层玻色流体层的一维声子热容。然后我们在18A孔洞中实现了一维玻色流体，我们可以预期孔洞中有一维的3He费米流体。从热容降到80mK，我们发现2^lt；Nd&gt；层膜是费米流体。为了了解3He流体的一维性质，我们利用核退磁低温恒温器准备了低至1mK的HAR容量测量。对于Hectorite上的3He，热容结果表明，随着二维费米液体覆盖度的增加，我们观察到了大的密度和二维自旋涨落特征。对于吸附在斜方沸石上的氦3和氦4，我们在10 MHz的超声波测量中观察到了原子滑移。

Helium 4 adsorbed on one-dimensional pores of the diameter about 18A has been studied by measuring pressure of adsorption at temperatures down to 0. 5K and the pressures within the accuracy of 0. 1Pa. From the pressure data, we obtained the coverage dependences of the adsorption energy and compressibility. The results indicate the layer-by-layer formation on the pore walls up to the second layer. The 2^<nd> layer was found to be the Bose fluids by the isotope effect of the 3He- and 4He-heat capacities and the superfluid observation by torsional oscillator. The 4He heat capacity of the 2^<nd> layer has a temperature -linear term, which was understood to be the 1D phonon heat capacity of the 2^<nd> Bose fluid layer. Then we realized the 1D Bose fluid in the 18A pores.We can expect the 1D 3He Fermi fluids in the pores. From the heat capacity down to 80mK, we found that the 2^<nd> layer films are Fermi fluids. To see the 1D properties of the 3He fluids, we are preparing hear capacity measurement down to about 1mK by using the nuclear demagnetizing cryostat.For 3He on Hectorite, the heat capacity results suggest the weak-localization-2D Fermi liquid and Mott-Hubbard transitions with increasing the coverage In the 2D Fermi liquids, we observed large density and spin-fluctuations characteristic to the two-dimension. For Helium 3 and 4 adsorbed on Hectorite, we obserbed atomic slippage in the ultra sound measurement at 10MHz.