Superconductivity in quantum-dot superlattices composed of quantum wire networks

Details Superconductivity in quantum-dot superlattices composed of quantum wire networks Superconductivity in quantum-dot superlattices composed of quantum wire networks

2002-04-10

arxiv.org/abs/cond-mat/0204218v1

Physical Review B 66, 132508 (2002) (4 pages); http://link.aps.org/abstract/PRB/v66/e132508

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 4 figures

Scientific paper

10.1103/PhysRevB.66.132508

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 $T_c$ 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.

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