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

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...

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Bibliographic Details
Published in:arXiv.org 2014-07
Main Authors: Chia-Heng, Sun, Po-Chen, Tai, Jheng-An Jiang, Wu, Cen-Shawn, Jeng-Chung, Chen, Yung-Fu, Chen
Format: Article
Language:English
Subjects:
Aluminum
Charge transfer
Electron tunneling
Semiconductor devices
Single-electron transistors
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1407.1652