Single Cooper-pair tunneling junctions using high-{Tc} superconducting materials

Journal Article · Wed Sep 01 04:00:00 EDT 1999 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)

DOI:https://doi.org/10.1109/20.800766· OSTI ID:20000850

Kim, S J; Latyshev, Yu I; Yamashita, T

The authors introduce the single electron (Cooper-pair) tunneling junctions using c-axis Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+d} (Bi-2212) superconducting single crystal whiskers. Focused-ion-beam (FIB) etching patterned the Bi-2212 whiskers. The fabricated small stacked junctions have in-plane area S smaller than <1 {micro}m{sup 2}. The junctions showed the current-voltage (I-V) characteristics with the periodic structure of current peaks. The stacking layered structure of Bi-2212 works as multi-junctions array which decrease the effective capacitance, C{sub {Sigma}} = C{sub 0}/N, where C{sub 0} is the capacitance of junction and N is the layer number of elementary junctions. The period of current peaks of I-V curves corresponds to the charging energy of the single Cooper pair, 2Ec (=e{sup 2}/C{sub {Sigma}}).

• Research Organization: Tohoku Univ., Sendai (JP)
• OSTI ID: 20000850
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers) Journal Issue: 5Pt2 Vol. 35; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
BISMUTH OXIDES
CALCIUM OXIDES
COOPER PAIRS
COPPER OXIDES
ELECTRICAL PROPERTIES
FABRICATION
HIGH-TC SUPERCONDUCTORS
MORPHOLOGY
STRONTIUM OXIDES
SUPERCONDUCTING JUNCTIONS
TUNNEL EFFECT