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Direct evidence for the sliding motion of CDW-the motional narrowing of 87Rb NMR

K Nomura, K Kume and M Sato

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A 87Rb NMR experiment was carried out on a single crystal of Rb0.3MoO3 by applying a pulse current at 77K. With increasing current, the NMR lineshape varied from a double-horned one at zero current to a single-line spectrum at a high current level. This line narrowing can be attributed to the motional narrowing effect due to the sliding motion of CDW. The sliding velocity was estimated to be about 10-2 cm s-1 for the current density 7 A cm-2, around which the motional narrowing occurred. From this relationship between the sliding velocity and the applied current, the electron density was found to be 4*1021 electrons cm-3, which was consistent with the value estimated from the chemical formula of the compound under study.


PACS

76.60.-k Nuclear magnetic resonance and relaxation

71.45.Lr Charge-density-wave systems

Subjects

Condensed matter: electrical, magnetic and optical

Dates

Issue 13 (10 May 1986)



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