Bottom-up superconducting and Josephson junction devices inside a group-IV semiconductor

Yun-Pil Shim () and Charles Tahan ()
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Yun-Pil Shim: Laboratory for Physical Sciences
Charles Tahan: Laboratory for Physical Sciences

Nature Communications, 2014, vol. 5, issue 1, 1-8

Abstract: Abstract Superconducting circuits are exceptionally flexible, enabling many different devices from sensors to quantum computers. Separately, epitaxial semiconductor devices such as spin qubits in silicon offer more limited device variation but extraordinary quantum properties for a solid-state system. It might be possible to merge the two approaches, making single-crystal superconducting devices out of a semiconductor by utilizing the latest atomistic fabrication techniques. Here we propose superconducting devices made from precision hole-doped regions within a silicon (or germanium) single crystal. We analyse the properties of this superconducting semiconductor and show that practical superconducting wires, Josephson tunnel junctions or weak links, superconducting quantum interference devices (SQUIDs) and qubits are feasible. This work motivates the pursuit of ‘bottom-up’ superconductivity for improved or fundamentally different technology and physics.

Date: 2014
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DOI: 10.1038/ncomms5225

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