In-plane selective area InSb–Al nanowire quantum networks

Op het Veld, Roy L. M.; Xu, Di; Schaller, Vanessa; Verheijen, Marcel A.; Peters, Stan M. E.; Jung, Jason; Tong, Chuyao; Wang, Qingzhen; de Moor, Michiel W. A.; Hesselmann, Bart; Vermeulen, Kiefer; Bommer, Jouri D. S.; Sue Lee, Joon; Sarikov, Andrey; Pendharkar, Mihir; Marzegalli, Anna; Koelling, Sebastian; Kouwenhoven, Leo P.; Miglio, Leo; Palmstrøm, Chris J.; Zhang, Hao; Bakkers, Erik P. A. M.

doi:10.1038/s42005-020-0324-4

In-plane selective area InSb–Al nanowire quantum networks

Journal Article · Thu Mar 26 00:00:00 EDT 2020 · Communications Physics

DOI:https://doi.org/10.1038/s42005-020-0324-4· OSTI ID:1619745

Op het Veld, Roy L. M.; ; Schaller, Vanessa; ; Peters, Stan M. E.; Jung, Jason; Tong, Chuyao; Wang, Qingzhen; de Moor, Michiel W. A.; Hesselmann, Bart; Vermeulen, Kiefer; Bommer, Jouri D. S.; ; Sarikov, Andrey; ; Marzegalli, Anna; Koelling, Sebastian; Kouwenhoven, Leo P.; Miglio, Leo; Palmstrøm, Chris J. more »

Abstract

Strong spin–orbit semiconductor nanowires coupled to a superconductor are predicted to host Majorana zero modes. Exchange (braiding) operations of Majorana modes form the logical gates of a topological quantum computer and require a network of nanowires. Here, we utilize an in-plane selective area growth technique for InSb–Al semiconductor–superconductor nanowire networks. Transport channels, free from extended defects, in InSb nanowire networks are realized on insulating, but heavily mismatched InP (111)B substrates by full relaxation of the lattice mismatch at the nanowire/substrate interface and nucleation of a complete network from a single nucleation site by optimizing the surface diffusion length of the adatoms. Essential quantum transport phenomena for topological quantum computing are demonstrated in these structures including phase-coherence lengths exceeding several micrometers with Aharonov–Bohm oscillations up to five harmonics and a hard superconducting gap accompanied by 2 e -periodic Coulomb oscillations with an Al-based Cooper pair island integrated in the nanowire network.

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Research Organization:: Univ. of Minnesota, Minneapolis, MN (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0019274

OSTI ID:: 1619745

Alternate ID(s):: OSTI ID: 1803659

Journal Information:: Communications Physics, Journal Name: Communications Physics Journal Issue: 1 Vol. 3; ISSN 2399-3650

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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