Superconductor-insulator transition in two-dimensional dirty boson systems
Journal Article
·
· Physical Review, B: Condensed Matter; (United States)
- Department of Theoretical Physics, Royal Institute of Technology, S-100 44 Stockholm (Sweden)
- Department of Physics, University of British Columbia, Vancouver, British Columbia, V6T 1Z1 (Canada)
- Department of Physics, Indiana University, Bloomington, Indiana 47405 (United States)
- Department of Physics, University of California, Santa Cruz, California 95064 (United States)
Universal properties of the zero-temperature superconductor-insulator transition in two-dimensional amorphous films are studied by extensive Monte Carlo simulations of bosons in a disordered medium. We report results for both short-range and long-range Coulomb interactions for several different points in parameter space. In all cases we observe a transition from a superconducting phase to an insulating Bose glass phase. From finite-size scaling of our Monte Carlo data we determine the universal conductivity [sigma][sup *] and the critical exponents at the transition. The result [sigma][sup *]=(0.55[plus minus]0.66)(2[ital e])[sup 2]/[ital h] for bosons with long-range Coulomb interaction is roughly consistent with experiments reported so far. We also find [sigma][sup *]=(0.14[plus minus]0.03)(2[ital e])[sup 2]/[ital h] for bosons with short-range interactions.
- DOE Contract Number:
- FG02-90ER45427
- OSTI ID:
- 5007303
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 49:17; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMORPHOUS STATE
BOSONS
CALCULATION METHODS
COULOMB FIELD
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRIC FIELDS
ELECTRICAL PROPERTIES
FILMS
MATERIALS
MATHEMATICAL MODELS
MONTE CARLO METHOD
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
THIN FILMS
TWO-DIMENSIONAL CALCULATIONS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMORPHOUS STATE
BOSONS
CALCULATION METHODS
COULOMB FIELD
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRIC FIELDS
ELECTRICAL PROPERTIES
FILMS
MATERIALS
MATHEMATICAL MODELS
MONTE CARLO METHOD
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
THIN FILMS
TWO-DIMENSIONAL CALCULATIONS