Crystal analysis of grain boundaries in boron-doped diamond superconducting quantum interference devices operating above liquid helium temperature
Crystal analysis of grain boundaries in boron-doped diamond superconducting quantum interference devices operating above liquid helium temperature
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在液氦温度以上工作的掺硼金刚石超导量子干涉装置的晶界晶体分析
DOI:
10.1016/j.carbon.2021.04.097
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发表时间:
2021
期刊:
影响因子:
10.9
通讯作者:
Kawarada Hiroshi
中科院分区:
文献类型:
--
作者:
Morishita Aoi;Amano Shotaro;Tsuyuzaki Ikuto;Kageura Taisuke;Takahashi Yasuhiro;Tachiki Minoru;Ooi Shuuichi;Takano Miwako;Arisawa Shunichi;Takano Yoshihiko;Kawarada Hiroshi
Superconducting quantum interference devices (SQUIDs) are magnetometers with ultra-high sensitivity that have garnered attention owing to their potential application in flux qubits for quantum computing. The Josephson junction is an important component that determines the characteristics of a SQUID. Based on the superconductivity of heavily boron-doped diamond (111) homoepitaxial layers with a high critical temperature (Tc> 10 K), we propose two types of Josephson junction structures with discontinuous (111) boundaries. These structures allow the SQUID to operate above liquid helium temperature (4.2 K) with high reproducibility. We analyzed local misorientation and strain (i.e., compressive, tensile, and shear strain) at the boundary via electron backscatter diffraction. The Josephson junction characteristics were attributed to the weak link with discontinuous boundaries of diamond (111) sectors.
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