论文标题
关于微波辐射探测器应用的颗粒钼薄膜的直流传输和Terahertz电导率的研究
Studies on DC transport and terahertz conductivity of granular molybdenum thin films for microwave radiation detector applications
论文作者
论文摘要
已在正常和超导状态下研究了嵌入无定形基质中的纳米粒的DC磁子溅射的颗粒钼薄膜的形态，运输和Terahertz光学性质。这些薄膜的超导过渡温度远高于大量钼。这些薄膜的光学特性已经使用了Terahertz时域光谱学研究了。它们的性质已与用于开发辐射探测器的现有材料进行了比较。膜的电阻率在于> 100 micro-Ohm-CM范围内，这是制造高度敏感的辐射探测器的理想选择。大厅的测量表明存在孔作为具有非常小的自由路径和活动性的主要载体。在正常状态下，薄膜是无序的坏金属，但它们的超导状态具有较大的超流体密度和刚度。膜的正常状态和超导性能非常有前途，对于微波炉，Terahertz和远IR频率范围用于低温辐射探测器。
The morphological, transport and terahertz optical properties of DC magnetron sputtered granular molybdenum thin-films with nano-grains embedded in an amorphous matrix have been studied in the normal and superconducting states. The superconducting transition temperatures of these films are much higher than that of bulk molybdenum. The optical properties of these thin-films have been studied using terahertz time-domain spectroscopy. Their properties have been compared with the existing materials used for the development of radiation detectors. The resistivity of the films lies in >100 micro-Ohm-cm range which is ideal for making highly sensitive radiation detectors. The Hall measurements indicate the presence of holes as the dominant carriers with very small mean free path and mobility. In the normal state, the films are disordered bad metal but they have large superfluid density and stiffness in their superconducting state. The normal state and superconducting properties of the films are very promising for their use in cryogenic radiation detectors for microwave, terahertz, and far IR frequency ranges.
