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Coulomb Blockade and Coherent Single-Cooper-Pair Tunneling in Single Josephson Junctions | | Michio Watanabe
; David B. Haviland
; | | Date: |
24 Mar 2001 | | Journal: | Phys. Rev. Lett. vol. 86, pp. 5120-5123 (2001) | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Abstract: | We have measured the current-voltage characteristics of small-capacitance single Josephson junctions at low temperatures (T < 0.04 K), where the strength of the coupling between the single junction and the electromagnetic environment was controlled with one-dimensional arrays of dc SQUIDs. We have clearly observed Coulomb blockade of Cooper-pair tunneling and even a region of negative differential resistance, when the zero-bias resistance of the SQUID arrays is much higher than the quantum resistance h/e^2 = 26 kohm. The negative differential resistance is evidence of coherent single-Cooper-pair tunneling in the single Josephson junction. | | Source: | arXiv, cond-mat/0103502 | | Services: | Forum | Review | PDF | Favorites | |
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