Phys. Rev. B 73, 153403 (2006) [4 pages]Quenching of phase coherence in quasi-one-dimensional ring crystalsReceived 14 November 2005; revised 17 January 2006; published 10 April 2006 A comparison of the single-particle (SP) dynamics of whisker and ring NbSe3 crystals provides new insight into the phase transition properties of quasi-one-dimensional charge density wave (CDW) systems. In the incommensurate CDW phase, SP relaxation triggered by an ultrafast laser pulse reflects the formation of collective states, and reveals the divergence of the relaxation time when approaching a transition temperature. The degree of divergence is less pronounced in rings than in whiskers, suggesting a loss of phase coherence in ring crystals characterized by a closed-loop topology. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.73.153403
DOI:
10.1103/PhysRevB.73.153403
PACS:
78.47.+p, 71.45.Lr
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