Time-domain study of low-dimensional chaos in the switching charge-density-wave conductor NbSe[sub 3]

We study the dynamics of switching charge-density waves (CDWs) in the presence of combined dc and ac electric fields. Analysis of the time series provides Lyapunov exponents, and an estimate for the number of active degrees of freedom. The dynamics are both low dimensional and chaotic. The principal...

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Bibliographic Details
Published in:Physical review letters 1993-04, Vol.70:17
Main Authors: Levy, J., Sherwin, M.S., Theiler, J.
Format: Article
Language:English
Subjects:
CALCULATION METHODS
CHALCOGENIDES
CHARGE DENSITY
COLLECTIVE EXCITATIONS
DEGREES OF FREEDOM
DYNAMICS
ELECTRIC FIELDS
ELECTRICAL PROPERTIES
ENERGY-LEVEL TRANSITIONS
EXCITATION
LYAPUNOV METHOD
MATERIALS SCIENCE
MECHANICS
NIOBIUM COMPOUNDS
NIOBIUM SELENIDES
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
SELENIDES
SELENIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS 360606 > Other Materials-- Physical Properties-- (1992-)
TRANSPORT THEORY
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Summary:We study the dynamics of switching charge-density waves (CDWs) in the presence of combined dc and ac electric fields. Analysis of the time series provides Lyapunov exponents, and an estimate for the number of active degrees of freedom. The dynamics are both low dimensional and chaotic. The principal nonlinearity which gives rise to the chaos in switching CDWs is shown to be the hysteresis in the depinning transition, rather than the interaction between two frequencies.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.70.2597