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Enhancing superconducting critical current by randomness
- Source :
- Physical Review B. 93
- Publication Year :
- 2016
- Publisher :
- American Physical Society (APS), 2016.
-
Abstract
- The key ingredient of high critical currents in a type-II superconductor is defect sites that 'pin' vortices. Contrary to earlier understanding on nano-patterned artificial pinning, here we show unequivocally the advantages of a random pinscape over an ordered array in a wide magnetic field range. We reveal that the better performance of a random pinscape is due to the variation of its local-density-of-pinning-sites (LDOPS), which mitigates the motion of vortices. This is confirmed by achieving even higher enhancement of the critical current through a conformally mapped random pinscape, where the distribution of the LDOPS is further enlarged. The demonstrated key role of LDOPS in enhancing superconducting critical currents gets at the heart of random versus commensurate pinning. Our findings highlight the importance of random pinscapes in enhancing the superconducting critical currents of applied superconductors.<br />Comment: To appear in Physical Review B
- Subjects :
- Physics
Superconductivity
Imagination
Condensed Matter - Mesoscale and Nanoscale Physics
Condensed matter physics
Condensed Matter - Superconductivity
media_common.quotation_subject
FOS: Physical sciences
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Magnetic field
Vortex
Superconductivity (cond-mat.supr-con)
Condensed Matter::Superconductivity
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
0103 physical sciences
Range (statistics)
Critical current
010306 general physics
0210 nano-technology
Pinning force
Randomness
media_common
Subjects
Details
- ISSN :
- 24699969 and 24699950
- Volume :
- 93
- Database :
- OpenAIRE
- Journal :
- Physical Review B
- Accession number :
- edsair.doi.dedup.....72d38fd14b7175d7a453cfbf73674418