Transport Properties of Boron-Doped Nanocrystalline Diamond (BNCD)

掺硼纳米晶金刚石 (BNCD) 的输运特性

• 批准号: 2126775
• 金额: --
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2126775
• 关键词: Transport; Properties; Boron; Doped; Nanocrystalline

The research is focussed on the properties of superconducting boron-doped nanocrystalline diamond (BNCD) films.The BNCD system is a highly tuneable system, where the electron carrier concentration can be controlled by the levelof boron doping, allowing a transition from insulating to superconducting behaviour. The material is granular, with thesize of the grains depending on the film thickness and details of the deposition process. We are currently developing thetheory for the increase in electrical conductivity close to the superconducting transition temperature (the fluctuation conductivity). Experimentally this shows three distinct regions with different power law behaviours, which is believed to be due to the size of the Cooper pair relative to that of a typical grain. We have currently calculated all the contributions to the fluctuation conductivity, and are trying to reconcile them with the experimental data from our collaborators in Cardiff.Detailed fitting will hopefully provide a method for extracting various material parameters of BNCD and other granularsuperconducting systems.

研究重点是超导硼掺杂纳米晶金刚石（BNCD）薄膜的性能。BNCD系统是一个高度可调的系统，其中电子载流子浓度可以通过硼掺杂水平来控制，从而实现从绝缘行为到超导行为的转变。该材料是颗粒状的，颗粒的大小取决于薄膜厚度和沉积过程的细节。我们目前正在开发接近超导转变温度的电导率增加的理论（波动电导率）。在实验上，这显示了具有不同幂律行为的三个不同区域，这被认为是由于库珀对相对于典型颗粒的大小造成的。我们目前已经计算了对波动电导率的所有贡献，并试图将它们与我们在卡迪夫的合作者的实验数据进行协调。详细的拟合有望提供一种提取 BNCD 和其他粒状超导系统的各种材料参数的方法。