Charge density wave transport in irradiated orthorhombic TaS3
Résumé
Dynamic resistance, noise spectrum and electron diffraction studies on electron irradiated orthorhombic TaS3 were performed in the temperature range of 75 K-280 K. At low defect concentrations (< 10-4 displacement per Ta atoms) the threshold field of the nonlinear conductivity (ET) increases linearly with the irradiation dose in spite of the fact that there is hardly any effect on the Peierls transition temperature, Tp = 221 K. Concomitantly the sharp peaks in the noise spectrum are smeared out and the broad band noise level increases. At higher defect concentrations, Tp decreases and the transverse coherence of CDWs is lost. In this regime the sharp threshold disappears from the nonlinear characteristics.
Mots clés
charge density waves
electron beam effects
electron diffraction examination of materials
one dimensional conductivity
Peierls instability
random noise
tantalum compounds
one dimensional
dynamic resistance
orthorhombic TaS sub 3
noise spectrum
electron diffraction
electron irradiated
nonlinear conductivity
Peierls transition temperature
broad band noise level
transverse coherence
CDWs
Domaines
Articles anciens
Origine : Accord explicite pour ce dépôt
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