Effect of quasiparticle tunneling on quantum-phase fluctuations and the onset of superconductivity in granular films

Journal Article · Fri May 01 00:00:00 EDT 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.35.7256· OSTI ID:6652561

Chakravarty, S; Kivelson, S; Zimanyi, G T; Halperin, B I

Recent experiments on the onset of superconductivity in granular films have raised a number of interesting issues regarding the role of quantum fluctuations of the phase variable. We model the granular film as an ordered array of Josephson-coupled grains, and we take into account quasiparticle tunneling via the method of Ambegaokar, Eckern, and Schoen. The onset of superconductivity, at T = 0, occurs when the value of the normal-state sheet resistance has a critical value of order h/4e/sup 2/, which is not very sensitive to the capacitance of the grains.

• Research Organization: Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11794
• OSTI ID: 6652561
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 35:13
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
GRANULAR MATERIALS
SUPERCONDUCTIVITY
SUPERCONDUCTING FILMS
TUNNEL EFFECT
FLUCTUATIONS
HAMILTONIANS
QUASI PARTICLES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FILMS
MATERIALS
MATHEMATICAL OPERATORS
PHYSICAL PROPERTIES
QUANTUM OPERATORS
VARIATIONS
656100* - Condensed Matter Physics- Superconductivity