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APS » Journals » Phys. Rev. Lett. » Volume 100 » Issue 9
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Phys. Rev. Lett. 100, 096403 (2008) [4 pages]

Observation of Correlations Up To the Micrometer Scale in Sliding Charge-Density Waves

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D. Le Bolloc’h1, V. L. R. Jacques1,3, N. Kirova1, J. Dumas2, S. Ravy3, J. Marcus2, and F. Livet4
1Laboratoire de Physique des Solides (CNRS-UMR 8502), Bâtiment 510, Université Paris-sud, 91405 Orsay cedex, France
2Institut Néel, CNRS/UJF, BP166 38042 Grenoble cedex 9, France
3Synchrotron SOLEIL, L’Orme des merisiers, Saint-Aubin BP 48, 91192 Gif-sur-Yvette cedex, France
4Sciences et Ingénierie des Matériaux et Procédés, INP Grenoble CNRS UJF, BP 75, 38402 St Martin d’Hères Cedex, France

Received 31 July 2007; published 4 March 2008

A high resolution coherent x-ray diffraction experiment has been performed on the charge-density wave (CDW) system K0.3MoO3. The 2kF satellite reflection associated with the CDW has been measured with respect to external dc currents. In the sliding regime, the 2kF satellite reflection displays secondary satellites along the chain axis which corresponds to correlations up to the micrometer scale. This super long-range order is 1500 times larger than the CDW period itself. This new type of electronic correlation seems inherent to the collective dynamics of electrons in charge-density wave systems. Several scenarios are discussed.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.096403
DOI:
10.1103/PhysRevLett.100.096403
PACS:
71.45.Lr
 
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