Anisotropy of the Josephson Critical Current between <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>UPt</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span> and <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Nb</mi></math></span>

A. Sumiyama; S. Shibata; Y. Oda; N. Kimura; E. Yamamoto; Y. Haga; Y. O¯nuki

doi:10.1103/PhysRevLett.81.5213

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Anisotropy of the Josephson Critical Current between ${UPt}_{3}$ and $Nb$

A. Sumiyama¹, S. Shibata¹, Y. Oda¹, N. Kimura², E. Yamamoto³, Y. Haga³, and Y. O¯nuki^3,4

¹Department of Material Science, Faculty of Science, Himeji Institute of Technology, Ako¯-gun 678-1297, Japan
²Center for Low Temperature Science, Tohoku University, Sendai 980-8578, Japan
³Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai 319-1106, Japan
⁴Graduate School of Science, Osaka University, Toyonaka 560-0043, Japan

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Phys. Rev. Lett. 81, 5213 – Published 7 December, 1998

DOI: https://doi.org/10.1103/PhysRevLett.81.5213

Abstract

Josephson critical current densities $J_{c}$ between a single crystal ${UPt}_{3}$ and an $s$ -wave superconductor have been investigated for ${UPt}_{3} - Cu - Nb$ junctions and ${UPt}_{3} - Nb$ junctions. The anisotropic temperature dependence is observed at about the lower critical temperature $T_{c}^{-}$ of ${UPt}_{3}$ ; the increase in $J_{c}$ with decreasing temperatures becomes fast below $T_{c}^{-}$ for a current flow parallel to the crystallographic $c$ axis and it becomes rather slow below $T_{c}^{-}$ for a current flow parallel to the $b$ axis. This anisotropy gives clear evidence that the Josephson effect reflects the anisotropic superconductivity of ${UPt}_{3}$ .

References (17)

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[c1] G. Bruls et al., Phys. Rev. Lett. 65, 2294 (1990).

[c2] K. Hasselbach, L. Taillefer, and J. Flouquet, Phys. Rev. Lett. 63, 93 (1989).

[c3] G. Goll et al., Phys. Rev. Lett. 70, 2008 (1993).

[c4] H. Tou et al., Phys. Rev. Lett. 77, 1374 (1996).

[c5] K. Tenya et al., Phys. Rev. Lett. 77, 3193 (1996).

[c6] U. Poppe, J. Magn. Magn. Mater. 52, 157 (1985).

[c7] Yu. G. Naidyuk et al., Physica (Amsterdam) 218B, 161 (1996).

[c8] T. Koyama et al., J. Phys. Soc. Jpn. 67, 1797 (1998).

[c9] N. Kimura et al., J. Phys. Soc. Jpn. 64, 388l (1995).

[c10] S. K. Yip, O. F. De Alcantara Bonfim, and P. Kumar, Phys. Rev. B 41, 11 214 (1990).

[c11] S. K. Yip, J. Low Temp. Phys. 91, 203 (1993).

[c12] J. Clarke, Phys. Rev. B 4, 2963 (1971).

[c13] E. V. Thuneberg and V. Ambegaokar, Phys. Rev. Lett. 60, 365 (1988).

[c14] A. Millis, D. Rainer, and J. A. Sauls, Phys. Rev. B 38, 4504 (1988).

[c15] J. Clarke, Proc. R. Soc. London A 308, 447 (1969).

[c16] G. Deutscher and R. W. Simon, J. Appl. Phys. 69, 4137 (1991).

[c17] S. K. Yip, Y. S. Sun, and J. A. Sauls, Czech. J. Phys. 46, 557 (1996).

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Anisotropy of the Josephson Critical Current between ${UPt}_{3}$ and $Nb$

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Anisotropy of the Josephson Critical Current between UPt3 and Nb

Abstract

References (17)

Anisotropy of the Josephson Critical Current between ${UPt}_{3}$ and $Nb$