Current suppression in a double-island single-electron transistor for detection of degenerate charge configurations of a floating double-dot

2003/10/21 by R. Brenner, Andrew D. Greentree, A. R. Hamilton
Physics and Astronomy · #Mechanical and Optical Resonators #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat

paper · pdf · doi:10.1063/1.1630382

published as Appl. Phys. Lett. 83, 4640 (2003). · 3 pages, 3 figures, to appear in Appl. Phys. Lett

arxiv created 2003/10/21 · openalex publication_date 2003/11/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We have investigated a double-island single-electron transistor (DISET) coupled to a floating metal double-dot (DD). Low-temperature transport measurements were used to map out the charge configurations of both the DISET and the DD. A suppression of the current through the DISET was observed whenever the charge configurations of the DISET and the DD were energetically codegenerate. This effect was used to distinguish between degenerate and nondegenerate charge configurations of the DD. We also show that this detection scheme reduces the susceptibility of the DISET to interference from random charge noise.

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