Abstract
An array of 1126 identical microapertures is used as the hydrodynamic inductance in a superfluid3He Helmholtz resonator. Each aperture is 0.27 micron square, fabricated by e-beam lithography in a 0.1 micron thick SiN membrane. These dimensions are not too much larger than the superfluid coherence length and therefore, particularly at higher temperatures, an aperture might be though of as a Josephson weak link (in the sense of a Dayem bridge). The superfluid3He critical mass current, Ic, through this array has been measured over a wide range of temperatures. The results indicate that the critical current has a Ginzburg-Landau form of Ic=Ico(1-T/Tc)3/2. This temperature dependence is consistent with phase slippage (not necessarily involving vortices), at the pair breaking velocity, as the critical mechanism.
Similar content being viewed by others
References
O. Avenel and E. Varoquaux, Phys. Rev. Lett.60, 416, 1988.
A. Amar, Y. Sasaki, R.L. Lozes, J.C. Davis and R.E. Packard, J. of Vac. Sci. and Technol.,B11, 259 (1993)
R.E. Packard and S. Vitale, Phys. Rev.B46, 3540 (1992)
J. Steinhauer, Ph.D. Thesis, U. C. Berkeley, unpublished.
S.V. Pereverzev and J.C. Davis, in these proceedings.
Author information
Authors and Affiliations
Additional information
This work supported by the Office of Naval Research and the National Science Foundation.
Rights and permissions
About this article
Cite this article
Mukharsky, Y.M., Loshak, A., Schwab, K. et al. Study of an array of superfluid3He weak links. Czech J Phys 46 (Suppl 1), 115–116 (1996). https://doi.org/10.1007/BF02569473
Issue Date:
DOI: https://doi.org/10.1007/BF02569473