Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1998-05-11
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
29 pages, 16 eps figures, uses aipproc.sty and epsfig.sty, contribution to Euroschool on "Superconductivity in Networks and Me
Scientific paper
10.1063/1.55279
We describe transport properties of two-dimensional arrays of low capacitance tunnel junctions, such as the current voltage characteristic and its dependence on external magnetic field and temperature. We discuss several experiments in which the small capacitance of the junctions plays an important role. In arrays where the junctions have a relatively large charging energy, (i.e. when they have a low capacitance) and a high normal state resistance, the low bias resistance increases with decreasing temperature and eventually at very low temperature the array becomes insulating even though the electrodes in the array are superconducting. This transition to the insulating state can be described by thermal activation. In an intermediate region where the junction resistance is of the order of the quantum resistance and the charging energy is of the order of the Josephson coupling energy, the arrays can be tuned between a superconducting and an insulating state with a magnetic field. We describe measurements of this magnetic-field-tuned superconductor insulator transition, and we show that the resistance data can be scaled over several orders of magnitude. Four arrays follow the same universal function. At the transition the transverse (Hall) resistance is found to be very small in comparison with the longitudinal resistance. However, for magnetic field values larger than the critical value.we observe a substantial Hall resistance. The Hall resistance of these arrays oscillates with the applied magnetic field. features in the magnetic field dependence of the Hall resistance can qualitatively be correlated to features in the derivative of the longitudinal resistance, similar to what is found in the quantum Hall effect.
Bergsten Tobias
Chen Ding Chuan
Claeson Tord
Delsing Per
Haviland David B.
No associations
LandOfFree
Two-dimensional arrays of low capacitance tunnel junctions: general properties, phase transitions and Hall effect does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Two-dimensional arrays of low capacitance tunnel junctions: general properties, phase transitions and Hall effect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-dimensional arrays of low capacitance tunnel junctions: general properties, phase transitions and Hall effect will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-719148