Recently, superconductivity has been found in heavily boron-doped diamond prepared by high temperature/high pressure synthesis or chemical vapour deposition. An alternative doping method of technological relevance is ion implantation. It is an open question whether superconductivity can also be obtained in boron-implanted diamond. Here we report on the transport and magnetic properties of high dose (2.3 X10~(16)-1.7 X 10~(17) cm~(-2)) boron-implanted natural IIa diamond samples doped at elevated temperature of 900 deg C and subsequently annealed at 1500 deg C and 1700 deg C. For comparison implantation at room temperature was also carried out. The samples were further characterized by Raman and infrared spectroscopy. No superconductivity could be detected in the samples at temperatures down to 40 mK. We discuss the possible origin for the absence of superconductivity.
展开▼
机译：最近，在通过高温/高压合成或化学气相沉积制备的重硼掺杂金刚石中发现了超导性。具有技术相关性的另一种掺杂方法是离子注入。是否还可以在注入硼的金刚石中获得超导性，这是一个悬而未决的问题。在这里我们报告了掺杂高剂量（2.3 X10〜（16）-1.7 X 10〜（17）cm〜（-2））掺硼的天然IIa金刚石样品在900摄氏度和900摄氏度的高温下掺杂的输运和磁性随后在1500℃和1700℃下退火。为了比较，还进行了室温下的注入。通过拉曼光谱和红外光谱进一步表征样品。在低至40 mK的温度下，样品中未检测到超导性。我们讨论了不存在超导性的可能起源。
展开▼
