Superconductivity in CVD Diamond Thin Film Well-Above Liquid Helium Temperature
作者： Yoshihiko Takano , Masanori Nagao , Isao Sakaguchi , Minoru Tachiki , Takeshi Hatano
DOI: 10.1063/1.1802389
关键词: Chemical vapor deposition 、 Thermal conductivity 、 Boron 、 Diamond 、 Liquid helium 、 Superconductivity 、 Semiconductor 、 Condensed matter physics 、 Materials science 、 Thin film
摘要: Diamond has always been adored as a jewel. Even more fascinating is its outstanding physical properties; it the hardest material known in world with highest thermal conductivity. Meanwhile, when we turn to electrical properties, diamond rather featureless insulator. However, boron doping, becomes p-type semiconductor, acting charge acceptor. Therefore recent news of superconductivity heavily boron-doped synthesized by high pressure sintering was received considerable surprise. Opening up new possibilities for diamond-based devices, systematic investigation these phenomena clearly needs be achieved. Here show unambiguous evidence thin film deposited chemical vapor deposition (CVD) method. Furthermore onset superconducting transition found 7.4K, which higher than reported value ref(7) and well above helium liquid temperature. This finding establishes universal property diamond, demonstrating that device application indeed feasible challenge.
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