Hot spot formation in electron-doped PCCO nanobridges

Charpentier, Sophie; Arpaia, Riccardo; Gaudet, Jonathan; Matte, Dominique; Baghdadi, Reza; Löfwander, Tomas; Golubev, Dmitry S.; Fournier, P.; Lombardi, Floriana

doi:10.1103/physrevb.94.060503

Cited by 21 publications

(9 citation statements)

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“…At present, the materials that best satsify these requirements, and are commonly used for SNSPDs, are granular LTS such as NbN, NbTiN and WSi [12]. An alternative route would be to use HTS [20,21], in particular YBCO nanowires [2,[22][23][24][25][26], which could help realizing detectors that operate at higher temperatures. It is, however, challanging to use YBCO for SNSPDs.…”

Section: Nanowire Based Single-photon Detectors: Main Requirementsmentioning

confidence: 99%

Fabrication and electrical transport characterization of high quality underdoped YBa₂Cu₃O_7-δ nanowires

Andersson

Arpaia

Trabaldo

et al. 2020

Supercond. Sci. Technol.

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We present the fabrication and electrical transport characterization of underdoped YBa2Cu3O7-δ nanowires. The nanowires have been realized without any protective capping layer and they show transport properties similar to those of the parent thin film, demonstrating that they have not been damaged by the nanopatterning. The current-voltage characteristics of the underdoped nanowires show large hysteretic voltage switching at the critical current, in contrast to the flux-flow like characteristics of optimally doped nanostructures, indicating the formation of a self-stabilizing hot spot. These results open up new possibilities of using the underdoped nanowires for single photon detection and for exploring the underdoped side of the YBa2Cu3O7-δ phase diagram at the nanoscale.

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Section: Nanowire Based Single-photon Detectors: Main Requirementsmentioning

confidence: 99%

Fabrication and electrical transport characterization of high quality underdoped YBa₂Cu₃O_7-δ nanowires

Andersson

Arpaia

Trabaldo

et al. 2020

Supercond. Sci. Technol.

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“…Qualitatively, within the simplistic framework of the self-heating hotspot model [72], which has been even recently used to describe the IVC of NbN [26,73,74] and cuprate HTS [75,76] nanowires, the central part of the wire becomes normal due to Joule heating, producing a power equal to I • V . A cooling mechanism follows, via phonons and electron diffusion.…”

Section: Ultrathin Bare Nanowires: a Possible Platform For Ybco Singl...mentioning

confidence: 99%

Transport properties of ultrathin YBa2Cu3O7−δ nanowires: A route to single-photon detection

et al. 2017

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We report on the growth and characterization of ultrathin YBa2Cu3O 7−δ (YBCO) films on MgO (110) substrates, which exhibit superconducting properties at thicknesses down to 3 nm. YBCO nanowires, with thicknesses down to 10 nm and widths down to 65 nm, have been also successfully fabricated. The nanowires protected by a Au capping layer show superconducting properties close to the as-grown films, and critical current densities, which are only limited by vortex dynamics. The 10 nm thick YBCO nanowires without the Au capping present hysteretic current voltage characteristics, characterized by a voltage switch which drives the nanowires directly from the superconducting to the normal state. Such bistability is associated in NbN nanowires to the presence of localized normal domains within the superconductor. The presence of the voltage switch, in ultrathin nanostructures characterized by high sheet resistance values, though preserving high quality superconducting properties, make our nanowires very attractive devices to engineer single photon detectors.arXiv:1708.04721v1 [cond-mat.supr-con]

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“…On the other hand, the high values of the thermal conductivity and of the Ginzburg-Landau parameter favor flux-flow behaviors, preventing selfheating effects, which could bring the nanostrips from the zero-voltage state directly to the normal state. In the context of HTSs, the observation of thermally hysteretic IVCs in ultrathin Pr 2−x Ce x CuO 4−δ (PCCO) nanostrips has been recently reported [22]. Recent research attention has been devoted to the realization of high critical current of ultrathin YBCO films [23], culminating with the observation of thermal hysteretic YBCO nanostrips IVCs [24].…”

Section: Introductionmentioning

confidence: 99%

Observation of dark pulses in 10 nm thick YBCO nanostrips presenting hysteretic current voltage characteristics

Ejrnæs

Parlato

Arpaia

et al. 2017

Supercond. Sci. Technol.

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We have fabricated several 10 nm thick and 65 nm wide YBa2Cu3O7−δ (YBCO) nanostrips. The nanostrips with the highest critical current densities are characterized by hysteretic current voltage characteristics (IVCs) with a direct bistable switch from the zero-voltage to the finite voltage state. The presence of hysteretic IVCs allowed the observation of dark pulses due to fluctuations phenomena. The key role of the bistable behavior is its ability to transform a small disturbance (e.g. an intrinsic fluctuation) into a measurable transient signal, i.e. a dark pulse. On the contrary, in devices characterized by lower critical current density values, the IVCs are non-hysteretic and dark pulses have not been observed. To investigate the physical origin of the dark pulses, we have measured the bias current dependence of the dark pulse rate: the observed exponential increase with the bias current is compatible with mechanisms based on thermal activation of magnetic vortices in the nanostrip. We believe that the successful amplification of small fluctuation events into measurable signals in nanostrips of ultrathin YBCO is a milestone for further investigation of YBCO nanostrips for superconducting nanostrip single photon detectors and other quantum detectors for operation at higher temperatures.

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Hot spot formation in electron-doped PCCO nanobridges

Cited by 21 publications

References 50 publications

Fabrication and electrical transport characterization of high quality underdoped YBa₂Cu₃O_7-δ nanowires

Fabrication and electrical transport characterization of high quality underdoped YBa₂Cu₃O_7-δ nanowires

Transport properties of ultrathin YBa2Cu3O7−δ nanowires: A route to single-photon detection

Observation of dark pulses in 10 nm thick YBCO nanostrips presenting hysteretic current voltage characteristics

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Hot spot formation in electron-doped PCCO nanobridges

Cited by 21 publications

References 50 publications

Fabrication and electrical transport characterization of high quality underdoped YBa2Cu3O7-δ nanowires

Fabrication and electrical transport characterization of high quality underdoped YBa2Cu3O7-δ nanowires

Transport properties of ultrathin YBa2Cu3O7−δ nanowires: A route to single-photon detection

Observation of dark pulses in 10 nm thick YBCO nanostrips presenting hysteretic current voltage characteristics

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Fabrication and electrical transport characterization of high quality underdoped YBa₂Cu₃O_7-δ nanowires

Fabrication and electrical transport characterization of high quality underdoped YBa₂Cu₃O_7-δ nanowires