The Japan Material Research Institute and the Waseda University Joint Research Group recently discovered that boron-doped diamond films can enter superconducting states at very low temperatures. This new superconducting material is expected to be used for the development of new superconducting thin films and superconducting elements.
According to the Nikkei Industry News, the film is formed by chemical vapor generation. The gas is first irradiated with microwaves to make it ionized. When ionized gas is stacked on a silicon substrate, 2% of boron is added. The experimental results show that the sample enters the superconducting state at an absolute temperature of 8.7K.
Prior to this, the Russian research team had discovered that the diamond particles synthesized by high temperature and high pressure become superconducting materials at an absolute temperature of 2.3K. However, because of the fine particles, it is difficult to apply to the development of new components, and the diamond thin film superconducting material produced after adding boron is more suitable for industrial applications.
Diamond is composed of carbon atoms and is generally non-conductive. Pure diamond is actually a good insulator. However, if diamond is doped with a small amount of boron or nitrogen, it becomes a semiconductor. Due to its small size and high temperature resistance, diamond semiconductors have unique advantages in the manufacture of electronic or optoelectronic components.
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