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Improved characteristics of mesa-type intrinsic Josephson junctions by vacuum cleavage process for Bi2Sr2CaCu2O8+δ/Au contacts
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10.1116/1.4707151
/content/avs/journal/jvsta/30/3/10.1116/1.4707151
http://aip.metastore.ingenta.com/content/avs/journal/jvsta/30/3/10.1116/1.4707151

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Bi-2212 single-crystal pieces. (a) Pieces harvested from a sintered bulk. (b) AFM image of a cleaved surface.

Image of FIG. 2.
FIG. 2.

ρ c dependence of P BP .

Image of FIG. 3.
FIG. 3.

(Color online) Voltage noise caused by Bi-2212/Au contacts at 77 K. (a) Noise power spectra and (b) time series data of voltage fluctuations.

Image of FIG. 4.
FIG. 4.

(Color online) Mesa-type IJJ; (a) schematic diagram of the cross section and (b) top view schematic and photograph.

Image of FIG. 5.
FIG. 5.

(Color online) Double-side type IJJ: (a) three-dimensional schematic diagram and (b) top view photograph.

Image of FIG. 6.
FIG. 6.

(Color online) I–V curves of mesa-type IJJs prepared with the vacuum cleavage process at 77 K. (a) Four terminals and (b) three terminals.

Image of FIG. 7.
FIG. 7.

(Color online) Typical I–V curves of IJJs in the low voltage region for (a) air- and (b) vacuum-cleaved mesa types and (c) the double-side type. The multiple branches in (c) were obtained using the persistence function of the oscilloscope.

Image of FIG. 8.
FIG. 8.

(Color online) I c of the nth junction normalized on the basis of the tenth junction.

Tables

Generic image for table
TABLE I.

Au deposition conditions.

Generic image for table
TABLE II.

ρ c For the Bi-2212/Au interface at 300 and 77 K (Ω cm2).

Generic image for table
TABLE III.

Fitting parameters determined from Eq. (1).

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/content/avs/journal/jvsta/30/3/10.1116/1.4707151
2012-04-27
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Improved characteristics of mesa-type intrinsic Josephson junctions by vacuum cleavage process for Bi2Sr2CaCu2O8+δ/Au contacts
http://aip.metastore.ingenta.com/content/avs/journal/jvsta/30/3/10.1116/1.4707151
10.1116/1.4707151
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