Electron‐electron interaction in linear arrays of small tunnel junctions
作者:
K. K. Likharev,
K. A. Matsuoka,
期刊:
Applied Physics Letters
(AIP Available online 1995)
卷期:
Volume 67,
issue 20
页码: 3037-3039
ISSN:0003-6951
年代: 1995
DOI:10.1063/1.115446
出版商: AIP
数据来源: AIP
摘要:
We have calculated the spatial distribution of the electrostatic potential created by an unbalanced chargeqin one of the conducting electrodes of a long, uniform, linear array of small tunnel junctions. The distribution describes, in particular, the shape of a topological single‐electron soliton in such an array. An analytical solution obtained for a circular cross‐section model is compared with results of geometrical modeling of a more realistic structure with square cross section. These solutions are very close to one another, and can be reasonably approximated by a simple phenomenological expression. In contrast to the previously accepted exponential approximation, the new result describes the crossover between the linear change of the potential near the center of the soliton to the unscreened Coulomb potential far from the center, with an unexpected ‘‘hump’’ near the crossover point. ©1995 American Institute of Physics.
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