Flux-line pinning by competing disorders

Journal Article · Thu Jul 01 04:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.1167· OSTI ID:6367012

Hwa, T; Nelson, D R ^[1]; Vinokur, V M ^[2]

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1. Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States)
2. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

Localization of flux lines by columnar defects is investigated in the presence of point disorder. A (1+1)-dimensional model is analyzed in some detail. When point disorder is weak, the phase transition is found to be of the Bose-glass type. Some aspects of the Bose-glass phase itself may be marginally unstable to weak point disorder, but only beyond an astronomically large crossover scale. Correlated disorder is always irrelevant when point disorder is very strong. The Bose-glass transition is also studied in a small transverse magnetic field. Critical exponents for the commensurate-incommensurate transition that occurs in this case are derived using scaling arguments.

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6367012
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:2; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DEFECTS
MAGNETIC FLUX
PHASE TRANSFORMATIONS
SCALING
SUPERCONDUCTORS
TWO-DIMENSIONAL CALCULATIONS
TYPE-II SUPERCONDUCTORS