Long hold times in a two-junction electron trap

Antti Kemppinen (Corresponding Author), S.V. Lotkhov, O.-P. Saira, A.B. Zorin, J.P. Pekola, Antti J. Manninen

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

The hold time τ of a single-electron trap is shown to increase significantly due to suppression of photon assisted tunneling events. Using two rf-tight radiation shields instead of a single one, we demonstrate increase of τ by a factor exceeding 103, up to about 10 h, for a trap with only two superconductor (S)—normal-metal (N) tunnel junctions and an on-chip resistor R ∼ 100 kΩ (R-SNS structure). In the normal state, the improved shielding made it possible to observe τ ∼ 100 s, which is in reasonable agreement with the quantum-leakage-limited level expected for the two-electron cotunneling process.
Original languageEnglish
Article number142106
Number of pages3
JournalApplied Physics Letters
Volume99
Issue number14
DOIs
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

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traps
tunnel junctions
resistors
shielding
leakage
electrons
chips
retarding
photons
radiation
metals

Keywords

  • electrometers
  • tunneling
  • electroluminescence
  • photoacoustic imaging
  • resistors

Cite this

Kemppinen, Antti ; Lotkhov, S.V. ; Saira, O.-P. ; Zorin, A.B. ; Pekola, J.P. ; Manninen, Antti J. / Long hold times in a two-junction electron trap. In: Applied Physics Letters. 2011 ; Vol. 99, No. 14.
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Long hold times in a two-junction electron trap. / Kemppinen, Antti (Corresponding Author); Lotkhov, S.V.; Saira, O.-P.; Zorin, A.B.; Pekola, J.P.; Manninen, Antti J.

In: Applied Physics Letters, Vol. 99, No. 14, 142106, 2011.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Long hold times in a two-junction electron trap

AU - Kemppinen, Antti

AU - Lotkhov, S.V.

AU - Saira, O.-P.

AU - Zorin, A.B.

AU - Pekola, J.P.

AU - Manninen, Antti J.

PY - 2011

Y1 - 2011

N2 - The hold time τ of a single-electron trap is shown to increase significantly due to suppression of photon assisted tunneling events. Using two rf-tight radiation shields instead of a single one, we demonstrate increase of τ by a factor exceeding 103, up to about 10 h, for a trap with only two superconductor (S)—normal-metal (N) tunnel junctions and an on-chip resistor R ∼ 100 kΩ (R-SNS structure). In the normal state, the improved shielding made it possible to observe τ ∼ 100 s, which is in reasonable agreement with the quantum-leakage-limited level expected for the two-electron cotunneling process.

AB - The hold time τ of a single-electron trap is shown to increase significantly due to suppression of photon assisted tunneling events. Using two rf-tight radiation shields instead of a single one, we demonstrate increase of τ by a factor exceeding 103, up to about 10 h, for a trap with only two superconductor (S)—normal-metal (N) tunnel junctions and an on-chip resistor R ∼ 100 kΩ (R-SNS structure). In the normal state, the improved shielding made it possible to observe τ ∼ 100 s, which is in reasonable agreement with the quantum-leakage-limited level expected for the two-electron cotunneling process.

KW - electrometers

KW - tunneling

KW - electroluminescence

KW - photoacoustic imaging

KW - resistors

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