Charge imbalance observed in voltage-biased superconductor–normal tunnel junctions
Physical Review B - Condensed Matter and Materials Physics Volume 73 Issue 13
Page 134507-1-134507-4
published_at 2006-04-07
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| File | |
| Title ( eng ) |
Charge imbalance observed in voltage-biased superconductor–normal tunnel junctions
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| Creator | |
| Source Title |
Physical Review B - Condensed Matter and Materials Physics
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| Volume | 73 |
| Issue | 13 |
| Start Page | 134507-1 |
| End Page | 134507-4 |
| Abstract |
We have studied the tunneling current of a superconductor-insulator-normal tunnel junction connected to a nonequilibrium superconductor in which nonvanishing charge imbalance is present, by injection experiments using multiterminal devices fabricated with electron beam lithography. We found that the tunneling current could be separated into excess current, due to charge imbalance, and normal current, which showed clear and different dependences on the bias voltage, as expected from the theory of charge imbalance [M. Tinkham, Phys. Rev. B 6, 1747 (1972)]. We also found in the analysis of the normal current that nonequilibrium distributions were created in the normal electrode; they were presumably caused by excitation due to hot electrons that tunneled from the nonequilibrium superconductor.
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2006-04-07 |
| Rights |
Copyright (c) 2006 American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.73.134507
[NCID] AA11187113
[DOI] http://dx.doi.org/10.1103/PhysRevB.65.220402
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