Superconductivity in quantum dot superlattices composed of quantum wire networks

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

doi:10.1103/PhysRevB.66.132508

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Superconductivity in quantum dot superlattices composed of quantum wire networks

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

DOI 10.1103/PhysRevB.66.132508 · Physical Review B

T1

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Abstract

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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
InAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.09	Pressure not reported	unknown
InAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.04	Pressure not reported	unknown