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Giant fluctuations ...
Giant fluctuations of superconducting order parameter in ferromagnet-superconductor single-electron transistors
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- Johansson, Jan (författare)
- KTH,Fysik
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- Korenivski, Vladislav (författare)
- KTH,Fysik
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- Haviland, David B. (författare)
- KTH,Fysik
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Brataas, A. (författare)
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(creator_code:org_t)
- 2004
- 2004
- Engelska.
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Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 93:21
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Spin dependent transport in a ferromagnet-superconductor single-electron transistor is studied theoretically taking into account spin accumulation, spin relaxation, gap suppression, and charging effects. A strong dependence of the gap on the magnetic state of the electrodes is found, which gives rise to a magnetoresistance of up to 100%. We predict that fluctuations of the spin accumulation can play such an important role as to cause the island to fluctuate between the superconducting and normal states. Furthermore, the device exhibits a nearly complete gate-controlled spin-valve effect.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- double tunnel-junctions
- spin imbalance
- critical field
- injection
- transport
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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