Magnetic switching of phase-slip dissipation in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi>NbSe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>nanoribbons

Falk, Abram L.; Deshmukh, Mandar M.; Prieto, Amy L.; Urban, Jeffrey J.; Jonas, Andrea; Park, Hongkun

doi:10.1103/physrevb.75.020501

Cited by 20 publications

(25 citation statements)

References 36 publications

(32 reference statements)

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“…Superconducting nanowires have recently received intense attention [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] . On one hand, they are highly desirable in future electronic nanodevices.…”

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Magnetoresistance oscillations in superconducting granular niobium nitride nanowires

et al. 2009

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We report on magnetoresistance oscillations in superconducting NbN x nanowires synthesized through ammonia gas annealing of NbSe 3 precursor nanostructures. Even though the transverse dimensions of the nanowires are much larger than the superconducting coherence length, the voltage-current characteristics of these nanowires at low temperatures are reminiscent of one-dimensional superconductors where quantum phase slips are associated with the origin of dissipation. We show that both the magnetoresistance oscillations and voltagecurrent characteristics observed in this work result from the granular structure of our nanowires.Superconducting nanowires have recently received intense attention. 1-16 On one hand, they are highly desirable in future electronic nanodevices. For example, nanowires of zero resistance are ideal interconnects since they can circumvent the damaging heat produced by energy dissipation in a normal nanoconductor whose high resistance is inversely proportional to its cross-section area. Furthermore, in the resistive state, they can act as superconducting quantum interference devices. 9,10 On the other hand, superconducting nanowires provide unique experimental testbeds to investigate and discover novel superconducting phenomena in confined geometries: Falk et al. probed dynamics of a few-row vortex lattice in NbSe 2 nanowires 15 and Tian et al. reported an antiproximity effect in Zn nanowires with bulk superconducting electrodes. 12 Quasi-one-dimensional ͑quasi-1D͒ superconducting nanowires with diameters comparable to the zero-temperature superconducting coherence length 0 have been the research subject of thermal and quantum phase slip phenomena which induce dissipations at temperatures near and away from the superconducting critical temperature, respectively.The observation of quantum phase slips ͑QPS͒ associated with the long resistance tail in the resistance versus temperature ͑R-T͒ curves at low temperatures is of significance not only for 1D superconductor but also for understanding the decoherence of a quantum system due to interaction with their environment. 14 However, interpretation of these results can be flawed by the presence of granularity in the nanowires that could give rise to a similar temperature dependence of the resistance. 4,7,13,17 Since it is extremely challenging in experiments to eliminate granularity, an alternative way to improve the understanding of the dissipation in 1D superconducting nanowires is to study superconducting granular nanowires in the absence of QPS and compare their properties with those observed in 1D nanowires.In this Brief Report, we report experiments on freestanding superconducting NbN x nanowires which are stable in ambient atmosphere, enabling the attachment of gold ͑Au͒ electrodes for standard four-probe measurements. We observed intriguing magnetoresistance oscillations, which we attribute to the granular nature of the nanowires. More importantly, in addition to the long tail in the R-T curves, we observed specific characteristics in the vol...

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Magnetoresistance oscillations in superconducting granular niobium nitride nanowires

et al. 2009

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“…This renders many superconductor NW fabrication methods 1,5,6,14,15 inapplicable, and so little has been reported in this area. Short HTS NWs (w ∼50 nm) have been synthesized, but superconductivity was only tested through magnetization measurements of powders of these materials.…”

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“…Similarly clean and featureless dV/dI plots were obtained for all YBCO NW devices. Peak line features in dV/dI-T plots are typical for long, conventional superconductor NWs, 7,15 reflecting multiple voltage-jump steps in V-I curves. Each such voltage-jump step is associated with the emergence of a localized resistive "phase-slip center" (PSC) along the NW.…”

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Long, Highly-Ordered High-Temperature Superconductor Nanowire Arrays

Heath

2008

Nano Lett.

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The preparation and electrical properties of high-temperature superconductor nanowire arrays are reported for the first time. YBa 2 Cu 3 O 7-δ nanowires with widths as small as 10 nm (much smaller than the magnetic penetration depth) and lengths up to 200 µm are studied by four-point electrical measurements. All nanowires exhibit a superconducting transition above liquid nitrogen temperature and a transition temperature width that depends strongly upon the nanowire dimensions. Nanowire size effects are systematically studied, and the results are modeled satisfactorily using phase-slip theories that generate reasonable parameters. These nanowires can function as superconducting nanoelectronic components over much wider temperature ranges as compared to conventional superconductor nanowires.A key question regarding the use of superconductors in nanoelectronic circuits is whether there is a critical size limit beyond which superconductivity can not be sustained. 1-3 A superconducting wire becomes quasi-one-dimensional (quasi-1D) when its width (w) is comparable to or smaller than the material-dependent Ginzburg-Landau coherence length (>∼100 nm for elemental superconductors) and magnetic penetration depth λ (∼40 nm for elemental superconductors). For bulk superconductors, the electrical resistance drops precipitously to zero below the superconducting transition temperature (T c ). For quasi-1D superconductors, the resistance decreases gradually below T c due to phase-slip processes. 2,4 This may result in resistive or insulating behaviors for thin (∼10 nm) wires when temperature approaches zero. 1,2 Narrow width (w ∼ 10 nm) nanowires (NWs) made from elemental superconductors 3,5-7 and from the binary alloy MoGe 1,2,8 are all quasi-1D systems, and strong suppression of superconductivity by phase-slip processes has been observed in these systems. The very low T c (typically below liquid helium temperature) limits their potential applications as zero-electrical resistance conductors or active components in nanoelectronic circuits. [8][9][10][11][12] In comparison, the short (∼1 nm) that characterizes high-temperature superconductor (HTS) materials 13 may reduce the influence on superconductivity of phase slip processes in HTS NWs, and the expected significantly higher T c should uniquely enable applications of HTS NW materials.However, achieving high-temperature superconductivity in NWs requires achieving the correct stoichiometry and the correct perovskite-like crystal structures of the HTS materials. This renders many superconductor NW fabrication methods 1,5,6,14,15 inapplicable, and so little has been reported in this area. Short HTS NWs (w ∼50 nm) have been synthesized, but superconductivity was only tested through magnetization measurements of powders of these materials. 16,17 Patterning HTS NWs from epitaxially grown HTS thin films is also challenging: HTS materials are unstable toward processing steps involving acid, water, or moderately elevated temperatures. In addition, for patterning, HTS films are...

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“…For these reasons, the use of CNT films, acting as template substrates, seems to be very promising in the fabrication of SNW networks. In this respect, recently, SNWs received a great attention due to their possible use in superconducting electronics [11][12][13][14][15][16][17]. The development of high resolution techniques such as electron beam lithography, although expensive, made individual SNWs possible candidates for current standards [11], sensors [12], actuators [13], microwave detectors [14], quantum bits [15][16][17] and other switching devices based on classical and quantum effects.…”

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confidence: 99%

Transport properties in aggregates of Nb nanowires templated by carbon nanotube films

Salvato

Cirillo

Fittipaldi

et al. 2016

Carbon

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Films of multiwall carbon nanotubes (CNTs), arranged on Si/SiO2 substrates, are used as templates for Nb films with thickness in the range 3-50 nm deposited by sputtering. The resulting aggregates show normal state and superconducting properties similar to those observed in networks of superconducting nanowires (SNW) obtained by other methods. Decreasing the Nb thickness, when the normal state resistance becomes larger than the quantum resistance, a superconductor-insulator transition is observed. Moreover, thermally activated phase slips in thicker samples, evolving in quantum phase slips in thinner nanowires, are observed in the superconducting state. The experimental results indicate that the template method based on CNTs is a promising alternative to the much more expensive nanolithography techniques for obtaining SNWs. Even more important, they indicate CNT films as versatile elements in nanostructured electronic devices

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Magnetic switching of phase-slip dissipation inNbSe2nanoribbons

Abstract: The stability of the superconducting dissipationless and resistive states in single-

Cited by 20 publications

References 36 publications

Magnetoresistance oscillations in superconducting granular niobium nitride nanowires

Magnetoresistance oscillations in superconducting granular niobium nitride nanowires

Long, Highly-Ordered High-Temperature Superconductor Nanowire Arrays

Transport properties in aggregates of Nb nanowires templated by carbon nanotube films

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