2010/10/22 by David Pekker, Gil Refael, Paul M. Goldbart
Physics and Astronomy · #Biasing #Condensed matter physics #Conductance #Coulomb blockade #Electron #Josephson effect #Magnetic field #Magnetic flux #Magnetic flux quantum #Magnetoresistance #Materials science #Mechanics #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #STRIPS #Superconductivity #Superconductivity in MgB2 and Alloys #Voltage #Vortex #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.107.017002
published as Phys. Rev. Lett. 107, 017002 (2011) · 4+a bit pages, 3 figures, 1 table
arxiv created 2010/10/22 · openalex publication_date 2011/06/30 · arxiv updated 2011/10/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Recent experiments on the conductance of thin, narrow superconducting strips have found periodic fluctuations, as a function of the perpendicular magnetic field, with a period corresponding to approximately two flux quanta per strip area [A. Johansson et al., Phys. Rev. Lett. 95, 116805 (2005)]. We argue that the low-energy degrees of freedom responsible for dissipation correspond to vortex motion. Using vortex-charge duality, we show that the superconducting strip behaves as the dual of a quantum dot, with the vortices, magnetic field, and bias current respectively playing the roles of the electrons, gate voltage, and source-drain voltage. In the bias-current versus magnetic-field plane, the strip conductance displays regions of small vortex conductance (i.e., small electrical resistance) that we term "Weber blockade" diamonds, which are dual to Coulomb blockade diamonds in quantum dots.