Abstract
We study the manipulation of thermal/quantum phase slips (tPSs/qPSs) in ultra-thin niobium-nitride superconducting nanowires (scNW) grown on carbon-nanotube templates. These NWs exhibit resistive steps in current–voltage (I–V) characteristics, and the number of phase slip centers (PSCs) in an NW can be tuned by the NW length. Under microwave (MW) radiation, emergence of each single PSC can be precisely controlled by varying the MW power. For thin and short scNW, a dip structure between the qPS-dominated low-temperature region and the tPS-dominated high-temperature region were observed owing to anti-proximity effect by electrodes.
Highlights
We study the manipulation of thermal/quantum phase slips in ultra-thin niobium-nitride superconducting nanowires grown on carbon-nanotube templates
We investigate the manipulation of thermal activation of PSs (tPSs) and quantum PSs (qPSs) under MWs in ultra-thin superconducting nanowires (scNW) grown on carbonnanotube (CNT) templates
From the resistive steps due to phase slip centers (PSCs) in current–voltage (I–V) characteristics, we found that the number of PSCs in single NW can be tuned by the NW length
Summary
We study the manipulation of thermal/quantum phase slips (tPSs/qPSs) in ultra-thin niobium-nitride superconducting nanowires (scNW) grown on carbon-nanotube templates. We found that superconducting and PSC states can be switched by MWs and the emergence of each single PSC can be precisely controlled by varying the MW power.
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