High‐quality Nb/HfOx‐Hf/Nb Josephson junction
作者： Shin’ichi Morohashi , Takeshi Imamura , Shinya Hasuo
DOI: 10.1063/1.106776
关键词: Quantum tunnelling 、 Hafnium 、 Josephson effect 、 Annealing (metallurgy) 、 Materials science 、 Thermal oxidation 、 Overlayer 、 Optoelectronics 、 Condensed matter physics 、 Oxide 、 Niobium
摘要: We fabricated a niobium (Nb) Josephson junction with hafnium (Hf) overlayer. The Hf native oxide (HfOx), formed by thermal oxidation, was used as the new tunneling barrier. selected an overlayer because of its good affinity to Nb and strong oxygen affinity. same way Nb/AlOx‐Al/Nb junctions. showed excellent I‐V characteristics (Vm=40 mV Vg=3.0 mV). critical current did not change annealing up 250 °C.
scitation.org
harvard.edu
aip.org
sci-hub.se 参考文章(7)
S. Basavaiah, J. H. Greiner, Capacitance and ellipsometrically determined oxide thickness of Nb‐oxide‐Pb Josephson tunnel junctions Journal of Applied Physics. ,vol. 47, pp. 4201- 4202 ,(1976) , 10.1063/1.323289
Tetsuyoshi Shiota, Takeshi Imamura, Shinya Hasuo, Annealing stability in superconducting Nb wiring with nitrogen plasma treatment Applied Physics Letters. ,vol. 58, pp. 750- 752 ,(1991) , 10.1063/1.104536
J.H.H. Perk, H.W. Capel, Time- and frequency-dependent correlation functions for the homogeneous and alternating-isotropic XY-models Physica A-statistical Mechanics and Its Applications. ,vol. 100, pp. 1- 23 ,(1980) , 10.1016/0378-4371(80)90147-8
Hidefumi Asano, Keiichi Tanabe, Yujiro Katoh, Osamu Michikami, Fabrication of All-Nb Josephson Junctions Using Oxidized Zr Overlayers Japanese Journal of Applied Physics. ,vol. 25, pp. L261- L263 ,(1986) , 10.1143/JJAP.25.L261
Shin’ichi Morohashi, Fujitoshi Shinoki, Akira Shoji, Masahiro Aoyagi, Hisao Hayakawa, High quality Nb/Al‐AlOx/Nb Josephson junction Applied Physics Letters. ,vol. 46, pp. 1179- 1181 ,(1985) , 10.1063/1.95696
Shin’ichi Morohashi, Akira Yoshida, Shinya Hasuo, Stability of high‐quality Nb/AlOx/Nb Josephson junctions Journal of Applied Physics. ,vol. 70, pp. 1806- 1810 ,(1991) , 10.1063/1.349496
M. Gurvitch, M. A. Washington, H. A. Huggins, High quality refractory Josephson tunnel junctions utilizing thin aluminum layers Applied Physics Letters. ,vol. 42, pp. 472- 474 ,(1983) , 10.1063/1.93974