Abstract
The proximity of a superconductor strongly influences theelectronic properties of a normal metal. We report onmeasurements of the re-entrant behavior of the conductance ofmesoscopic gold/niobium heterostructures. At very lowtemperature a novel peak shows up in the conductance vs.voltage characteristics which can be suppressed by smallmagnetic fields of several mT. Furthermore, the proximityeffect gives rise to unique electronic interferencecontributions resulting in an increase of the rms of theconductance fluctuations by a factor of 2 \(\sqrt 2 \) in ourheterostructures.
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REFERENCES
P. A. Lee and A. D. Stone, Phys. Rev. Lett. 55, 1622 (1985)
A. Altland and M. R. Zirnbauer, Phys. Rev. B 55, 1142 (1997)
T. T. Heikkila, M. M. Salomaa, and C. J. Lambert, Phys. Rev. B 60, 9291 (1999)
P. W. Brouwer and C. W. J. Beenakker, Phys. Rev. B 52, 16772 (1995)
K. Hecker, H. Hegger, A. Altland, and K. Fiegle, Phys. Rev. Lett. 79, 1547 (1997)
Recently, Y. Imry, H. Fukuyama, and P. Schwab, Europhys. Lett. 47, 608 (1999) suggested to take into account the effect of '1/f'-fluctuations on the dephasing of the electrons in disordered conductors at low temperatures which leads to a saturation of τϕ within a low-temperature range.
S. G. den Hartog and B. J. van Wees, Phys. Rev. Lett. 80, 5023 (1998)
K. Hecker, H. Hegger, A. Altland, and K. Fiegle, Phys. Rev. Lett. 80, 5024 (1998)
S. Gueron, H. Pothier, N. O. Birge, D. Esteve, and M. H. Devoret, Phys. Rev. Lett. 77, 3025 (1996)
H. Courtois, P. Charlat, Ph. Gandit, D. Mailly, and B. Pannetier, J. Low Temp. Phys. 116, 187 (1999)
S. N. Artemenko, A. F Volkov, and A. V. Zaitsev, Solid State Commun. 30, 771 (1979)
P. Charlat, H. Courtois, Ph. Gandit, D. Mailly, A. F. Volkov, and B. Pannetier, Phys. Rev. Lett. 77, 4950 (1996)
S. G. den Hartog, C. M. A. Kapteyn, B. J. van Wees, T. M. Klapwijk, W. van der Graaf, and G. Borghs, Phys. Rev. Lett. 76, 4592 (1996)
V. T. Petrashov, R. Sh. Shaikhaidorov, P. Delsing, and T. Claeson, JETP. Lett. 67, 513 (1998)
K. Hecker, H. Hegger, R. Schiifer, U. Murek, C. Braden, and W. Langheinrich, Phys. Rev. B 50, 18601 (1994)
Y. V. Nazarov and T. H. Stoof, Phys. Rev. Lett. 76, 823 (1996)
M. Giroud, H. Courtois, K. Hasselbach, D. Mailly, and B. Pannetier, Phys. Rev. B 58, R11872 (1998)
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Kemen, T., Bauch, T., Bär, W. et al. Magnetoconductance Fluctuations and Re-entrance Effect in Normal-metal/Superconductor Nanostructures. Journal of Low Temperature Physics 118, 679–687 (2000). https://doi.org/10.1023/A:1004647529550
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DOI: https://doi.org/10.1023/A:1004647529550