“Quantization” of the q-vector in microcrystals of K0.3MoO3 and NbSe3 |
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Authors: | SG Zybtsev VYa Pokrovskii SV Zaitsev-Zotov |
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Institution: | Kotel''nikov Institute of Radioengineering and Electronics of RAS, Mokhovaya 11-7, Moscow 125009, Russia |
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Abstract: | 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. |
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Keywords: | Charge-density wave Size effects Mobility Phase slippage |
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