Flip-Flopping Fractional Flux Quanta

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Ortlepp, T. and Ariando and Mielke, O. and Verwijs, C.J.M. and Foo, K.F.K. and Rogalla, H. and Uhlmann, F.H. and Hilgenkamp, H. (2006) Flip-Flopping Fractional Flux Quanta. Science, 312 (5779). pp. 1495-1497. ISSN 0036-8075

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Abstract:The d-wave pairing symmetry in high–critical temperature superconductors makes it possible to realize superconducting rings with built-in phase shifts. Such rings have a twofold degenerate ground state that is characterized by the spontaneous generation of fractional magnetic flux quanta with either up or down polarity. We have incorporated phase–biased superconducting rings in a logic circuit, a flip-flop, in which the fractional flux polarity is controllably toggled by applying single flux quantum pulses at the input channel. The integration of p rings into conventional rapid single flux quantum logic as natural two-state devices should alleviate the need for bias current lines, improve device symmetry, and enhance the operation margins
Item Type:Article
Additional information:Originally published in Science Express on 20 April 2006
Copyright:© AAAS
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/74123
Official URL:http://dx.doi.org/10.1126/science.1126041
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Metis ID: 233514