Quantum Interference Device Made by DNA Templating of Superconducting Nanowires
2005; American Association for the Advancement of Science; Volume: 308; Issue: 5729 Linguagem: Inglês
10.1126/science.1111307
ISSN1095-9203
AutoresDavid Hopkins, David Pekker, Paul M. Goldbart, Alexey Bezryadin,
Tópico(s)2D Materials and Applications
ResumoThe application of single molecules as templates for nanodevices is a promising direction for nanotechnology. We used a pair of suspended DNA molecules as templates for superconducting two-nanowire devices. Because the resulting wires are very thin, comparable to the DNA molecules themselves, they are susceptible to thermal fluctuations typical for one-dimensional superconductors and exhibit a nonzero resistance over a broad temperature range. We observed resistance oscillations in these two-nanowire structures that are different from the usual Little-Parks oscillations. Here, we provide a quantitative explanation for the observed quantum interference phenomenon, which takes into account strong phase gradients created in the leads by the applied magnetic field.
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