“Quantization” of the q-vector in microcrystals of K0.3MoO3 and NbSe3

We report steps of conductivity between discrete conducting states in microsamples of quasi-one-dimensional conductors K0.3MoO3 and NbSe3. The steps reveal single phase-slip events, and the discrete states reveal “quantization” of the wave vector q of the charge-density wave. The “quantization” is o...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2012-06, Vol.407 (11), p.1810-1812
Main Authors: Zybtsev, S.G., Pokrovskii, V.Ya, Zaitsev-Zotov, S.V.
Format: Article
Language:English
Subjects:
Boundary conditions
Charge-density wave
Coherence
Condensed matter
Conduction
Conductors
Microcrystals
Mobility
Phase slippage
Pocket
Quantization
Size effects
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Summary:We report steps of conductivity between discrete conducting states in microsamples of quasi-one-dimensional conductors K0.3MoO3 and NbSe3. The steps reveal single phase-slip events, and the discrete states reveal “quantization” of the wave vector q of the charge-density wave. The “quantization” is observed due to the coherence of the CDW within the sample volume and tight boundary conditions at the contacts. The distribution of steps in temperature gives the temperature dependences of the q-vectors, while the steps' height provides the carriers' mobilities. For the case of NbSe3 we give the 1st direct confirmation of the extremely high mobility of the “pocket” holes at low temperatures.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2012.01.036