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VOLUME 77, NUMBER 10 P H Y S I C A L R E V I E W L E T T E R S 2 SEPTEMBER 1996 Metastability and Glassy Behavior of a Driven Flux-Line Lattice
 

Summary: VOLUME 77, NUMBER 10 P H Y S I C A L R E V I E W L E T T E R S 2 SEPTEMBER 1996
Metastability and Glassy Behavior of a Driven Flux-Line Lattice
W. Henderson and E. Y. Andrei
Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08855
M. J. Higgins and S. Bhattacharya
NEC Research Institute, 4 Independence Way, Princeton, New Jersey 08540
(Received 13 May 1996)
Strong metastability and history dependence are observed in dc and pulsed transport studies of flux-
line lattices in 2H-NbSe2, leading to the identification of two distinct states of the lattice with different
spatial ordering. The metastability is most pronounced upon crossing a transition line marked by a
large jump in the critical current (the peak effect). Current-induced annealing of the metastable state
towards the stable state is observed with a strongly current dependent annealing time, which diverges
as a threshold current is approached from above. [S0031-9007(96)01054-X]
PACS numbers: 74.60.Ge, 74.60.Ec, 74.60.Jg
In the absence of disorder the physics of a mag-
netic flux-line lattice (FLL) is governed by the interplay
between thermal fluctuations, which favor melting, and
interactions, that lead to ordering. The resulting phase di-
agram consists of a liquid and a solid phase with rela-
tively simple dynamics. Quenched disorder causes the

  

Source: Andrei, Eva Y. - Department of Physics and Astronomy, Rutgers University

 

Collections: Materials Science; Physics