Superconductivity in quantum dot superlattices composed of quantum wire networks

Takashi Kimura, Hiroyuki Tamura, Kazuhiko Kuroki, Kenji Shiraishi, Hideaki Takayanagi, Ryotaro Arita

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Based on calculations using the local density approximation, we propose quantum wire networks with square and plaquette-type lattice structures that form quantum dot superlattices. These artificial structures are well described by the Hubbard model. Numerical analysis reveals a superconducting ground state with transition temperatures Tc of up to 90 mK for the plaquette, which is more than double the value of 40 mK for the square lattice type and is sufficiently high to allow for the experimental observation of superconductivity.

Original languageEnglish
Article number132508
Pages (from-to)1325081-1325084
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number13
Publication statusPublished - 1 Oct 2002

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