Double-side fabrication process and millimeter wave response of intrinsic Josephson junctions |
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Authors: | JingBo Wu DongChao Yi ZhengHao Gu Lin Kang WeiWei Xu Jian Chen and PeiHeng Wu |
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Institution: | (1) Research Institute of Superconductor Electronics, Nanjing University, Nanjing, 210093, China |
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Abstract: | We adopted double-side fabrication process to prepare intrinsic Josephson junctions (IJJs) based on Bi2Sr2CaCu2O8+x
(BSCCO) single crystals. Using crystal cleavage and double-side argon ion milling, we have successfully fabricated very uniform
IJJs with the thickness of single crystal slice less than 200 nm. Using quasi-optical system, the response of the IJJs to
millimeter wave radiation was studied. With applied magnetic field perpendicular to a-b plane, we have observed Shapiro steps under millimeter wave radiation, and the Josephson oscillation of each junction was
phase-locking.
Supported by the National Natural Science Foundation of China (Grant Nos. 60571007, 10778602, 60721063, 60610050), National
Basic Research Program of China (Grant No. 2006CB601006) and the Fund of Jiangsu Province (Grant No. BK2007713) |
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Keywords: | intrinsic Josephson junctions double-side fabrication process Shapiro step phase-locking |
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