RF-Current Effects on Intrinsic Josephson Junctions

Saleem, Sajid; Fenton, J. C.; Korsah, M; Speller, Susannah; Grovenor, C.R.M.; Warburton, Paul A.

doi:10.1109/tasc.2009.2019226

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2009

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“…The degree of suppression however can be seen to be very much stronger for the supercurrent branch than for the quasiparticle branches. A qualitatively similar effect has also been observed for Tl 2 Ba 2 CaCu 2 O 8 intrinsic junctions [14]. It is not obvious that the very different response of the five junctions to r.f.…”

Section: Figsupporting

confidence: 79%

The radio-frequency impedance of individual intrinsic Josephson junctions

Leiner

Saleem

Fenton

et al. 2009

Applied Physics Letters

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We have measured the response of an array of Bi 2 Sr 2 CaCu 2 O 8+δ intrinsic Josephson junctions to irradiation at 3 GHz. By measuring the dependence of the switching current upon the radio-frequency current for five of the junctions in the array we show quantitatively that the junctions have identical impedances at 3 GHz, this impedance being given by the inverse of the slope of the current-voltage characteristics. Single Bi 2 Sr 2 CaCu 2 O 8+δ (BSCCO) crystals were grown by using the travelling-solvent floating-zone technique [12]. The crystal was cut into platelets of approximate dimensions 3 mm x 200 µm x 20 µm (in the a-, b-and c-directions respectively), which were glued on top of an MgO substrate using polyimide. The crystal was cleaved in an argon-filled glove box in order to reduce the height in the c-direction to ~3 µm. Four silver contacts of thickness ~90

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confidence: 79%