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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Matsui, T. Ohta, H. |
| Copyright Year | 2002 |
| Abstract | Electron transport in short superconducting weak links is described in terms of multiple Andreev reflections (MAR). According to a recent theory, the current carried by the quasiparticles bound in the N region of a mesoscopic superconductor-normal-superconductor (SNS) weak link consists of dc and cosine components instead of a sinusoidal component. The presence of the dc pair-current component locks the phase relation of the wave function between superconducting grains throughout the series-parallel array of the SNS weak links. We have made a precise measurement of I-V characteristics at 63 K using a constriction in a YBCO polycrystalline film, in which networks of grain boundary Josephson weak links are naturally formed. The measured values of voltage between microwave-induced-current-steps are equal to the theoretical values for a single Josephson element, V/sub n/=n(hf/2e), within an error of 10 ppm. The experimental observation agreed with the theoretical relation to subnanovolt accuracy under irradiation by frequency-modulated millimeter waves. Phase locking of order parameters is thus observed in the array of mesoscopic SNS weak links in the HTS film. |
| Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
| Starting Page | 150 |
| Ending Page | 154 |
| Page Count | 5 |
| File Size | 578309 |
| File Format | |
| ISSN | 10518223 |
| Volume Number | 13 |
| Issue Number | 2 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2003-06-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Voltage Phased arrays Granular superconductors Superconducting microwave devices Superconducting devices Superconducting films Electrons Reflection Wave functions Yttrium barium copper oxide |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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