Fabrication and characterization of single Nb/NbxSi1-x/Nb Josephson junction for voltage standard

Cao Wen-Hui; Li Jin-Jin; Zhong Qing; Guo Xiao-Wei; He Qing; Chi Zong-Tao

doi:10.7498/aps.61.170304

Abstract

The core device of Modern programmable Josephson voltage standard is Josephson junction array. The most advantageous Josephson junction array is Nb/NbxSi1-x/Nb material array. The advantages of Nb/NbxSi1-x/Nb material Josephson junction are that three-layer film production process is simple, Nb and NbxSi1-x etching processes are the same and NbxSi1-x potential barrier layer components can be easily adjusted. In this paper, we investigate the NbxSi1-x/Nb single Josephson junction in National Institute of Metrology. Through measuring the dc current-voltage characteristics under low temperature (4.2 K), superconducting tunneling current and a zero voltage state jumping to voltage state are observed clearly, finally the measurement results are discussed. The work is the first study on Nb/NbxSi1-x/Nb single Josephson junction in China.

Keywords:

Authors and contacts

1.
National Institute of Metrology, Beijing 100013, China;
2.
Qingdao University, Qingdao 266003, China
Funds: Project supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology of China (Grant No. 2011BAK15B00).

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Cited By

[1]	Hamilton C A, Lloyd Frances L 1987 IEEE Electron Device Letters 8 449
[2]	Schulze H, Behr R 1998 Appl. Phys. 73 996
[3]	Yamanori H, Ishizaki M, Shoji A 2006 Appl. Phys. Lett. 88 042503
[4]	Benz S P, Hamilton C A, Burroughs C J, Harvey T E, Christian L A 1997 Appl. Phys. Lett. 71 1866
[5]	Chong Y, Burroughs C J, Dresselhaus P D, Hadacek N, Yamamori H, Benz S P 2005 IEEE Trans. Appl. Supercond. 15 461
[6]	Barrera A S, Beaseley M R 1987 IEEE Trans. Magn. MAG-23 866
[7]	Beak Burm, Dreesselhaus Paul D, Benz Samuel P 2006 IEEE Trans.Appl. Supercond. 16 1966
[8]	Mueller F, Behr R, Weimann T, Palafox L, Olaya D, Dresselhaus P D, Benz S P 2009 IEEE Trans. Appl. Supercond. 19 981
[9]	Dresselhaus Paul D, Elsbury Michael M, Olaya David, Burroughs Charles J, Benz Samuel P 2011 IEEE Trans. Appl. Supercond. 21 693
[10]	Gurvitch M, Washington M A, Huggins H A 1983 Appl. Phys. Lett. 42 472

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Vol. 61, Issue 17 - 2012-09-05

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