Multiple superconducting ring ratchets for ultrasensitive detection of non-equilibrium noises

Journal Article · Mon Jul 18 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4958731· OSTI ID:22594472

Gurtovoi, V. L. ^[1]; Exarchos, M. ^[2]; Antonov, V. N. ^[3]; Nikulov, A. V.; Tulin, V. A. ^[1]

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1. Institute of Microelectronics Technology and High Purity Materials, Russian Academy of Sciences, 142432 Chernogolovka, Moscow District (Russian Federation)
2. Physics Department, Royal Holloway University of London, Egham, Surrey TW20 0EX (United Kingdom)
3. Moscow Institute of Physics and Technology, 29 Institutskiy per., 141700 Dolgoprudny, Moscow Region (Russian Federation)

Magnetic quantum periodicity in the dc voltage is observed when asymmetric rings are switched between superconducting and normal state by a noise or ac current. This quantum effect is used for the detection of a non-equilibrium noise using a system of 667 asymmetric aluminum rings of 1 μm diameter connected in series. Any noise down to the equilibrium one can be detected with large number of asymmetric rings. The equilibrium noise can induce the dc voltage close to the superconducting transition. In our sample we observe the dc voltage oscillation only below the superconducting transition.

• OSTI ID: 22594472
• Journal Information: Applied Physics Letters, Vol. 109, Issue 3; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
ASYMMETRY
DETECTION
ELECTRIC POTENTIAL
EQUILIBRIUM
NOISE
OSCILLATIONS
PERIODICITY
RINGS
SUPERCONDUCTORS
SWITCHES