Design and performance of parallel-channel nanocryotrons in magnetic fields

Draher, Timothy; Polakovic, Tomas; Li, Yi; Pearson, John; Dibos, Alan; Meziani, Zein-Eddine; Xiao, Zhili; Novosad, Valentine

doi:10.1063/5.0180709

Title: Design and performance of parallel-channel nanocryotrons in magnetic fields

Journal Article · 17 December 2023 · Applied Physics Letters

DOI: https://doi.org/10.1063/5.0180709 · OSTI ID:2279145

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Argonne National Laboratory (ANL), Argonne, IL (United States); Northern Illinois Univ., DeKalb, IL (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States). Center for Nanoscale Materials (CNM)

We introduce a design modification to conventional geometry of the cryogenic three-terminal switch, the nanocryotron (nTron). The conventional geometry of nTrons is modified by including parallel current-carrying channels, an approach aimed at enhancing the device's performance in magnetic field environments. The common challenge in nTron technology is to maintain efficient operation under varying magnetic field conditions. Here, we show that the adaptation of parallel channel configurations leads to an enhanced gate signal sensitivity, an increase in operational gain, and a reduction in the impact of superconducting vortices on nTron operation within magnetic fields up to 1 T. Contrary to traditional designs that are constrained by their effective channel width, the parallel nanowire channels permits larger nTron cross sections, further bolstering the device's magnetic field resilience while improving electro-thermal recovery times due to reduced local inductance. This advancement in nTron design not only augments its functionality in magnetic fields but also broadens its applicability in technological environments, offering a simple design alternative to existing nTron devices.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States). Center for Nanoscale Materials (CNM)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

Grant/Contract Number:: AC02-06CH11357; SC0022060

OSTI ID:: 2279145

Journal Information:: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 25 Vol. 123; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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