Exploring of New Properties of Non-Epitaxial Metallic Superlattices and Development of High Conductivity Superlattice Films

1. Ag-Bi、Ag-Au、Yb-Sb和Bi-Sb系统的金属超晶格薄膜已按顺序生长，以研究电子特性和探索新特性。在一个可能的工作阶段，非外延电影的增长已经完成。由于X射线差异，超晶格结构得到确认。对于Ag-Bi和Ag-Au电影，抵抗力在层周期内<rho>具有1/<lambda>位置<lambda>。2. Yb-Sb超晶格系统被调查为希望获得一些新的电气特性。根据确定层数比率为1：1，厚度的周期<lambda>在10 - 1000之间变化<ang>，而阻力则被测量为温度的功能。电影《<lambda>&lt;&gt;!》100<ang>，金属行为被捕获，当电影<lambda>&lt;100<ang>时，半导体负温度依赖性被发现。日志与<rho>1/T不是直接的，但日志<rho>与1/（ &lt;T^（1/4）&gt;给了一个很好的直线拟合，因为系统受到了安德森洛的影响。 ... More 经校准的州。因此，Yb-Sb超晶格系统已经找到了显示金属·非金属转换在该期间非常共享<lambda>&lt;：!=&gt; 100<ang>. 3. Bi-Sb超晶格系统的详细情况更是调查。大容量双Sb系统被称为一个全范围的固体解决方案，从未有过， 4至40个原子。Sb Alloy shows semiconducting nature。什么是金属超晶格电影的行为？允许Sb的合并被替换为Sb与总周期层数的比率。关于十种不同的Sb层比率、抵抗力、霍尔系数和磁性的特性，被测量为温度的函数，从300 K到77 K。在更远的情况下，抵抗力被衡量为温度和负温度梯度的功能，为0到48个Sb比率提供了一定的能量差距值。通过分析这些数据，这种融合已经获得了4至48个超晶格系统显示半导体性质和最大能量差距为13兆V。这可能是合理的，因为估计的德·布罗格利波的长度为650<ang>英尺和170英尺。A&gt;对于Sb来说，它们的周期长度通常比周期长度长。Less（低）

1.Metallic superlattice films of Ag-Bi, Ag-Au, Yb-Sb and Bi-Sb systems were grown in order to investigate electrical properties and explore new features. In a possible stage of work, non-epitaxial film growth was done. By X-ray diffraction, superlattice structure was confirmed. For Ag-Bi and Ag-Au films, resistivity <rho> was proportional to 1/ <lambda> where <lambda> was the layer period.2.Yb-Sb superlattice system was investigated due to an expectation of getting some new electrical property. By setting the layer number ratio 1:1, the period of thickness <lambda> was varied from 10 to 1000 <ang> and the resistivities were measured as the function of temperature. The films of <lambda> <>!-> 100 <ang> , metallic behavior was obtained, while the films of <lambda> <100 <ang> ,semiconductive negative temperature dependence was found. The log <rho> vs. 1/T was not strait, but log <rho> vs. 1/( <T^(1/4)> gave a good fit of straight line which fact meant the system behaved as the Anderson lo … More calized state. Thus the Yb-Sb superlattice system has been found to show metal・non-metal transition very sharply at the period of <lambda> <:!=> 100 <ang> .3.Bi-Sb superlattice system was investigated rather in detail. The bulk Bi-Sb system is known as a whole range solid solution, nevertheless, 4 to 40 atom.% Sb alloy shows semiconducting nature. How is the behavior for the metallic superlattice films? The alloying concentration of Sb was substituted by the layer number ratio of Sb to the total perioic layer number. On the specimens of about ten kinds of Sb layer ratios, resistivity, Hall coefficient and magnetoresistance were measured as functions of temperature from 300K to 77K. Furthermore, the resistivity was measured as the function of temperature and negative temperature gradients were obtained for 0 to 48 Sb ratio, which gave apparent energy gap values. By analysing these data, such conclusion has been obtained that 4 to 48 Sb ratio of this superlattice system shows semiconductive nature and the maximum energy gap is 13 meV. It may be reasonable because the estimated de Broglie wave lengths of the carriers are 650 <ang> for Bi and 170 <゜!A> for Sb which are generally longer than the periodic length. Less