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arXiv · 1602.00873

Effect of dimensionality on sliding charge density waves. The case of the quasi-two dimensional TbTe$_3$ system probed by coherent x-ray diffraction

D. Le Bolloc'h·A. A. Sinchenko·V. L. R. Jacques·L. Ortega·J. E. Lorenzo·G. Chahine·. Lejay·P. Monceau
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Abstract

We report on sliding Charge Density Wave (CDW) in the quasi two-dimensional TbTe$_3$ system probed by coherent x-ray diffraction combined with {\it in-situ} transport measurements. We show that the non-Ohmic conductivity in TbTe$_3$ is made possible thanks to a strong distortion of the CDW. Our diffraction experiment versus current shows first that the CDW remains undeformed below the threshold current I$_S$ and then suddenly rotates and reorders by motion above threshold. Contrary to quasi-one dimensional systems, the CDW in TbTe$_3$ does not display any phase shifts below I$_S$ and tolerates only slow spatial variations of the phase above. This is a first observation of CDW behavior in the bulk in a quasi-two dimensional system allowing collective transport of charges at room temperature.

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D. Le Bolloc'h, A. A. Sinchenko, V. L. R. Jacques, L. Ortega, J. E. Lorenzo, G. Chahine, . Lejay, P. Monceau. 2016-02-02. Effect of dimensionality on sliding charge density waves. The case of the quasi-two dimensional TbTe$_3$ system probed by coherent x-ray diffraction. https://doi.org/10.1103/physrevb.93.165124

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