Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Magnetic field dependence of the current-voltage curve of a superconducting single electron transistor in a high impedance environment
AU - Pashkin, Yu. A.
AU - Chen, C. D.
AU - Haviland, D. B.
AU - Kuzmin, L. S.
PY - 1996
Y1 - 1996
N2 - A superconducting single electron transistor has been investigated in a regime where its behavior is governed by the interplay of charging and Josephson effects with the corresponding energies Ec and EJ, respectively. Using a SQUID geometry, we were able to change the ratio of EJ/Ec (from EJ/Ec≈3.5 to EJ/Ec≈0.44). In zero magnetic field, we observed a sharp Coulomb blockade at low current followed by a negative slope of the I–V curve at higher current. Applying an external magnetic field perpendicular to the substrate and thus decreasing EJ/Ec we observed an increase of the blockade voltage from 10 μV up to 45 μV and a decrease of the crossover current from 5 nA down to 0.5 nA. Such a behavior of the transistor can be explained using a Bloch band picture.
AB - A superconducting single electron transistor has been investigated in a regime where its behavior is governed by the interplay of charging and Josephson effects with the corresponding energies Ec and EJ, respectively. Using a SQUID geometry, we were able to change the ratio of EJ/Ec (from EJ/Ec≈3.5 to EJ/Ec≈0.44). In zero magnetic field, we observed a sharp Coulomb blockade at low current followed by a negative slope of the I–V curve at higher current. Applying an external magnetic field perpendicular to the substrate and thus decreasing EJ/Ec we observed an increase of the blockade voltage from 10 μV up to 45 μV and a decrease of the crossover current from 5 nA down to 0.5 nA. Such a behavior of the transistor can be explained using a Bloch band picture.
U2 - 10.1007/BF02571137
DO - 10.1007/BF02571137
M3 - Journal article
VL - 46
SP - 2291
EP - 2292
JO - Czechoslovak Journal of Physics
JF - Czechoslovak Journal of Physics
SN - 1572-9486
IS - 4
ER -