Self-heating-induced phenomena in long thin-film superconductors and their applications

Dharmadurai, G.

doi:10.1002/pssa.2210620102

Cited by 27 publications

(6 citation statements)

References 62 publications

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“…In order to make sense of our experimental results, we first review a theoretical model used extensively to interpret similar measurements. The Skocpol Beasley Tinkham (SBT) model 24 , including later generalizations 25 – 27 , forms the starting point for understanding hotspots in superconducting nanowires. The model considers a one-dimensional normal domain inside of an otherwise superconducting wire, centered at and extending to .…”

Section: Resultsmentioning

confidence: 99%

Self-heating hotspots in superconducting nanowires cooled by phonon black-body radiation

et al. 2022

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Controlling thermal transport is important for a range of devices and technologies, from phase change memories to next-generation electronics. This is especially true in nano-scale devices where thermal transport is altered by the influence of surfaces and changes in dimensionality. In superconducting nanowire single-photon detectors, the thermal boundary conductance between the nanowire and the substrate it is fabricated on influences all of the performance metrics that make these detectors attractive for applications. This includes the maximum count rate, latency, jitter, and quantum efficiency. Despite its importance, the study of thermal boundary conductance in superconducting nanowire devices has not been done systematically, primarily due to the lack of a straightforward characterization method. Here, we show that simple electrical measurements can be used to estimate the thermal boundary conductance between nanowires and substrates and that these measurements agree with acoustic mismatch theory across a variety of substrates. Numerical simulations allow us to refine our understanding, however, open questions remain. This work should enable thermal engineering in superconducting nanowire electronics and cryogenic detectors for improved device performance.

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Section: Resultsmentioning

confidence: 99%

Self-heating hotspots in superconducting nanowires cooled by phonon black-body radiation

et al. 2022

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“…This is usually estimated from the heat-flow equations by using the heat transfer coefficient h ͑or the thermal boundary resistance R bd ϭh Ϫ1 ͒ between the sample and the bath as determined from photoresponse [15][16][17] or by comparing the experimental data with theoretical models. [1][2][3][4]11,18 However, both methods have limited applicability since the heat transfer coefficient derived from the experimental data is model dependent. Another approach is to place the thermometer close to or on the sample 13,19 but even in this case the measured temperature is not necessarily that of the vortex lattice.…”

Section: Introductionmentioning

confidence: 99%

Joule heating induced by vortex motion in a type-II superconductor

et al. 2001

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We present experiments that determine the temperature increase in a type-II superconductor due to Joule heating induced by vortex motion. The effect of Joule heating is detected by comparing the response of the vortex lattice to fixed amplitude current steps of short ͑10 s͒ and long ͑4 s͒ duration, where the Joule heating is negligible and saturates, respectively. The thermometry is based on the temperature dependence of the voltage response of the vortex lattice to a driving current. By monitoring the temperature increase in NbSe 2 samples adhered on a sapphire substrate with GE varnish we obtain the effective heat transfer coefficient between the sample and the bath and show that the heating is primarily due to the power dissipated by the vortex motion.

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“…Эта модель является весьма популярной при описании нелинейных волн в однородных системах, в частности, тепловых доменов в сверхпроводящих микромостиках (модель «теплового пятна» -hot spot) 20 > 79 , тонких сверхпро-водящих пленках 19 , а также волн, возникающих при цепных химических реакциях на поверхности твердого катализатора 51 , 52 , в газовом разряде .…”

Section: в) точно решаемая модельunclassified

Localized waves in inhomogeneous media

Gurevich¹,

Mint︠s︡²

1984

Usp. Fiz. Nauk

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Self-heating-induced phenomena in long thin-film superconductors and their applications

Cited by 27 publications

References 62 publications

Self-heating hotspots in superconducting nanowires cooled by phonon black-body radiation

Self-heating hotspots in superconducting nanowires cooled by phonon black-body radiation

Joule heating induced by vortex motion in a type-II superconductor

Localized waves in inhomogeneous media

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