Thermal Resistivity at Interfaces between Metal and Dielectric Films at 1.5° to 4.2°K

Holt, V.E.

doi:10.1063/1.1708259

Cited by 23 publications

(7 citation statements)

References 5 publications

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“…For example it was shown in Ref. 25 that the thermal conductance is sensitive to the quality of adhesion of the film to the substrate; it was suggested that an imperfect bond may be able to allow the transmission of heat only via longitudinal waves. In view of the crude nature of these calculations, it is believed that the agreement between theory and experiment is certainly good enough to draw simple conclusions concerning the appropriate application of particular materials for use as substrate materials.…”

Section: Thermal Boundary Resistancementioning

confidence: 99%

Acoustic matching of superconducting films to substrates

1979

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Acoustic mismatch theory is used to estimate phonon transmission coefficients for various superconductor/substrate interfaces. It is shown that the conventionally employed substrates offer the largest acoustic mismatch to many of the commonly studied superconductors, thereby leading to unnecessarily large phonon-trapping and other nonequilibrium effects. Most available experimental results are shown to be in reasonable agreement with the theoretical estimates.

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Section: Thermal Boundary Resistancementioning

confidence: 99%

Acoustic matching of superconducting films to substrates

1979

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“…In measurement #2 we measured the I-V characteristic of a device mounted in a vacuum dewar, like it would be used in an astronomical receiver. In this case the significantly smaller Kapitza conductance between Au and SiO 2 results in a stronger heating effect than one would obtain for the same measurement with the device immersed in a LHe vessel where the Kapitza conductance is three times larger (values for the Kapitza resistances we used can be found in [13,14]). In Fig.…”

Section: Experiments and Measurement Resultsmentioning

confidence: 78%

Heat transfer coefficient saturation in superconducting Nb tunnel junctions contacted to a NbTiN circuit and an Au energy relaxation layer

Selig

Westig

Jacobs

et al. 2014

IEEE Trans. Appl. Supercond.

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International audienceIn this paper we present the experimental realization of a Nb tunnel junction connected to a high-gap superconducting NbTiN embedding circuit. We investigate relaxation of nonequilibrium quasiparticles in a small volume Au layer between the Nb tunnel junction and the NbTiN circuit. We find a saturation in the effective heat-transfer coefficient consistent with a simple theoretical model. This saturation is determined by the thickness of the Au layer. Our findings are important for the design of the ideal Au energy relaxation layer for practical SIS heterodyne mixers and we suggest two geometries, one, using a circular Au layer and, two, using a half-circular Au layer. Our work is concluded with an outlook of our future experiments

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“…The third fit parameter is the heat transfer coefficient ho which is a measure of the thermal coupling evaluated heat-transfer coefticient by Holt [35]. Figure 17 are most likely due to the fact that we assumed a temperature apparently smaller than the theoretical value.…”

Section: Experimental Results 1 9 O C R O U T P U T Inmentioning

confidence: 99%

Current-biased superconducting strips as position-sensitive particle detectors

Scherschel

Hagen

Jaggi

et al. 1995

Journal of Applied Physics

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The feasibility of superconducting strips as position-sensitive detectors for α particles was investigated. For this purpose films have been prepared of different materials and dimensions using standard evaporation and laser ablation in an UHV system. Films were patterned into strips and current-biased strips were irradiated with 5.5 MeV α particles. The energy deposited by the particle in the strip creates a normal-conducting region, which in turn causes a voltage drop. The time evolution of the voltage drop across the strip as a function of bath temperature and bias current has been investigated. Information about the site of the strip hit by the α particle was obtained from monitoring the propagating normal-conducting zones. A lateral position sensitivity of ±30 μm for a tantalum strip detector has been achieved. The propagation of normal-state zones in the strip cannot provide information on the energy of the particle. A model describing the time evolution of a normal-conducting zone in a current-biased superconducting strip was used to test and interpret the experimental results and allows one to estimate the thermal conductivity of the strip material and the heat transfer from the strip into the substrate.

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Thermal Resistivity at Interfaces between Metal and Dielectric Films at 1.5° to 4.2°K

Cited by 23 publications

References 5 publications

Acoustic matching of superconducting films to substrates

Acoustic matching of superconducting films to substrates

Heat transfer coefficient saturation in superconducting Nb tunnel junctions contacted to a NbTiN circuit and an Au energy relaxation layer

Current-biased superconducting strips as position-sensitive particle detectors

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