Experimental determination of the elastic cotunneling rate in a hybrid single-electron box

Journal Article · Mon Jun 09 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4882869· OSTI ID:22300032

Sun, Chia-Heng; Tai, Po-Chen; Chen, Yung-Fu ^[1]; Jiang, Jheng-An; Wu, Cen-Shawn ^[2]; Chen, Jeng-Chung ^[3]

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1. Department of Physics, National Central University, Jhongli 32001, Taiwan (China)
2. Department of Physics, National Changhua University of Education, Changhua 500, Taiwan (China)
3. Department of Physics, National Tsing-Hua University, Hsinchu 30013, Taiwan (China)

We report measurements of charge configurations and charge transfer dynamics in a hybrid single-electron box composed of aluminum and copper. We used two single-electron transistors (SETs) to simultaneously read out different parts of the box, enabling us to map out stability diagrams of the box and identify various charge transfer processes in the box. We further characterized the elastic cotunneling in the box, which is an important source of error in electron turnstiles consisting of hybrid SETs, and found that the rate was as low as 1 Hz at degeneracy and compatible with theoretical estimates for electron tunneling via virtual states in the central superconducting island of the box.

• OSTI ID: 22300032
• Journal Information: Applied Physics Letters, Vol. 104, Issue 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
CHARGE TRANSPORT
CONFIGURATION
COPPER
ELECTRONS
HYBRIDIZATION
READOUT SYSTEMS
STABILITY
TRANSISTORS
TUNNEL EFFECT
VIRTUAL STATES