Closed-cycle low-temperature probestation with magnetic (vector) field

具有磁（矢量）场的闭环低温探针台

• 批准号: 470578833
• 金额: --
• 依托单位: Universität Rostock
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2022
• 资助国家: 德国
• 起止时间: 2021-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/470578833?language=en
• 关键词: Closed; cycle; low; temperature; probestation

In recent years it has been found that, beyond traditional semiconductors, newly developed materials have interesting properties as electronic components. In addition to two-dimensional crystals based on transition metal chalcogenides, topological insulators and other surface-defined nanostructures show completely new aspects of solid-state physics and electrical transport. At the moment, these are difficult to produce with sufficient quality and structure. Their synthesis as colloidal nanomaterials is very promising, since this method offers a multitude of precise possibilities for influencing their structural properties. With the help of the requested probe station, the optoelectronic properties of such extended one- and two-dimensional colloidal nanostructures will to be investigated. In particular, the electrical transport mechanisms can be identified and characterized as a function of temperature and magnetic field. Since the energy differences and band gaps involved are quite small and the structures also have superconducting properties in some cases, corresponding low temperatures are necessary. For a complete characterization of transport processes the dependency on magnetic fields need to be characterized as well, which is why a cryostat with a built-in probestation for temperatures below 2 K and magnetic fields up to 9 T is requested.

近年来，人们发现，除了传统半导体之外，新开发的材料作为电子元件也具有有趣的特性。除了基于过渡金属硫属化物的二维晶体之外，拓扑绝缘体和其他表面定义的纳米结构还显示出固态物理和电传输的全新方面。目前，这些产品很难生产出足够的质量和结构。它们作为胶体纳米材料的合成非常有前途，因为这种方法为影响其结构特性提供了多种精确的可能性。在所需探针站的帮助下，将研究这种扩展的一维和二维胶体纳米结构的光电特性。特别是，可以根据温度和磁场来识别和表征电传输机制。由于所涉及的能量差和带隙非常小，并且结构在某些情况下还具有超导性质，因此需要相应的低温。为了完整地表征传输过程，还需要表征对磁场的依赖性，这就是为什么需要具有内置探针的低温恒温器，温度低于 2 K，磁场高达 9 T。