Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 15, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3111439
Keywords
charge density waves; niobium compounds; one-dimensional conductivity
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Funding
- ISTC, RFBR [08-02-01303-a, 07-02-01131-a, 06-02-72552, 72551-CNRSL_a]
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Whiskers of the quasi-one-dimensional conductor NbS3, phase II, have been synthesized. The samples show two charge-density wave (CDW) states: below 360 and below 150 K. Both CDWs show sharp threshold fields and coherent transport revealed by ac-dc coupling, i.e., Shapiro steps. The thinnest samples (cross sections below 10(4) nm(2)) exhibit Shapiro steps for frequencies at least as high as 4 GHz at room temperature. The results indicate that, for each of the CDW states, only one Nb chain per unit cell participates in the CDW transport.
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