Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
}
TY - GEN
T1 - Hybrid single-electron turnstile
T2 - 2010 Conference on Precision Electromagnetic Measurements
AU - Pekola, J. P.
AU - Averin, D. V.
AU - Kafanov, Sergey
AU - Kemppinen, A.
AU - Lotkhov, S. V.
AU - Maisi, V. F.
AU - Meschke, M.
AU - Mottonen, M.
AU - Pashkin, Yu. A.
AU - Saira, O. -P.
AU - Tsai, J. S.
AU - Zorin, A. B.
PY - 2010/6/13
Y1 - 2010/6/13
N2 - First I discuss various candidates of single-electron current pumps for quantum metrology. Then I focus on the hybrid normal-metal-superconductor turnstile in the form of a one-island single-electron transistor with one gate [1-3]. The device demonstrates robust current plateaus at multiple levels of ef at frequency f. I discuss the various error mechanisms, based on our experiments and theoretical considerations. Ultimately the quantization accuracy is expected to be limited by either two-electron tunneling or by Cooper-pair-electron co-tunneling [4]. We predict that it should be possible to achieve the metrological accuracy of 10−8, while maintaining the quantized current on the level of more than 10 pA, just by one turnstile with realistic parameters using aluminium as a superconductor. Recently we have managed to run ten turnstiles in parallel increasing the current level to above 100 pA [5]. Work on suppressing the harmful sub-gap leakage current is in progress with encouraging experimental results.
AB - First I discuss various candidates of single-electron current pumps for quantum metrology. Then I focus on the hybrid normal-metal-superconductor turnstile in the form of a one-island single-electron transistor with one gate [1-3]. The device demonstrates robust current plateaus at multiple levels of ef at frequency f. I discuss the various error mechanisms, based on our experiments and theoretical considerations. Ultimately the quantization accuracy is expected to be limited by either two-electron tunneling or by Cooper-pair-electron co-tunneling [4]. We predict that it should be possible to achieve the metrological accuracy of 10−8, while maintaining the quantized current on the level of more than 10 pA, just by one turnstile with realistic parameters using aluminium as a superconductor. Recently we have managed to run ten turnstiles in parallel increasing the current level to above 100 pA [5]. Work on suppressing the harmful sub-gap leakage current is in progress with encouraging experimental results.
KW - TRANSISTOR
U2 - 10.1109/CPEM.2010.5544502
DO - 10.1109/CPEM.2010.5544502
M3 - Conference contribution/Paper
SP - 88
EP - 88
BT - Precision Electromagnetic Measurements (CPEM), 2010 Conference on
PB - IEEE
Y2 - 13 June 2010 through 18 June 2010
ER -