Physics – Condensed Matter
Scientific paper
1993-09-16
Phys. Rev. B48, 15977 (1993)
Physics
Condensed Matter
15 pages plus 4 fig. appended, Revtex, INPE/LAS-003
Scientific paper
10.1103/PhysRevB.48.15977
The effects of the charging energy in the superconducting transition of granular materials or Josephson junction arrays is investigated using a pseudospin one model. Within a mean-field renormalization-group approach, we obtain the phase diagram as a function of temperature and charging energy. In contrast to early treatments, we find no sign of a reentrant transition in agreement with more recent studies. A crossover line is identified in the non-superconducting side of the phase diagram and along which we expect to observe anomalies in the transport and thermodynamic properties. We also study a charge ordering phase, which can appear for large nearest neighbor Coulomb interaction, and show that it leads to first-order transitions at low temperatures. We argue that, in the presence of charge ordering, a non monotonic behavior with decreasing temperature is possible with a maximum in the resistance just before entering the superconducting phase.
Continentino Mucio A.
Granato Enzo
No associations
LandOfFree
Charging Effects and Quantum Crossover in Granular Superconductors 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 Charging Effects and Quantum Crossover in Granular Superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charging Effects and Quantum Crossover in Granular Superconductors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-105555