Transport studies in a gate-tunable three-terminal Josephson junction

Graziano, Gino V.; Lee, Joon Sue; Pendharkar, Mihir; Palmstrøm, Chris J.; Pribiag, Vlad S.

doi:10.1103/PhysRevB.101.054510

Title: Transport studies in a gate-tunable three-terminal Josephson junction

Journal Article · Mon Feb 24 00:00:00 EST 2020 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.101.054510· OSTI ID:1601233

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Univ. of Minnesota, Minneapolis, MN (United States)
Univ. of California, Santa Barbara, CA (United States)

Josephson junctions with three or more superconducting leads have been predicted to exhibit topological effects in the presence of few conducting modes within the interstitial normal material. Such behavior, of relevance for topologically protected quantum bits, would lead to specific transport features measured between terminals, with topological phase transitions occurring as a function of phase and voltage bias. Although conventional, two-terminal Josephson junctions have been studied extensively, multiterminal devices have received relatively little attention to date. Motivated in part by the possibility to ultimately observe topological phenomena in multiterminal Josephson devices, as well as their potential for coupling gatemon qubits, here we describe the superconducting features of a top-gated mesoscopic three-terminal Josephson device. The device is based on an InAs two-dimensional electron gas proximitized by epitaxial aluminum. We map out the transport properties of the device as a function of bias currents, top gate voltage, and magnetic field. Finally, we find a very good agreement between the zero-field experimental phase diagram and a resistively and capacitively shunted junction computational model.

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

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF)

Grant/Contract Number:: SC0019274; DMR-1554609; ECCS-1542202

OSTI ID:: 1601233

Alternate ID(s):: OSTI ID: 1601702

Journal Information:: Physical Review B, Vol. 101, Issue 5; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 36 works

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Title: Transport studies in a gate-tunable three-terminal Josephson junction

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