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

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.

submitted to PRB

References in corpus (3)

• ARPES Study of the Evolution of Band Structure and Charge Density Wave Properties in RTe3 for R = Y, La, Ce, Sm, Gd, Tb and Dy
• Wave vector dependent electron-phonon coupling drives charge-density-wave formation in TbTe3
• Magnetic properties of the charge density wave compounds RTe3, R=Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er & Tm

Cited by in corpus (8)

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• Evidence of Charge Density Wave transverse pinning by x-ray micro-diffraction
• Toward equilibrium ground state of charge density waves in rare-earth tritellurides
• Tracking defects of Electronic Crystals by Coherent X-ray Diffraction
• The importance of shear on the collective charge transport in CDWs revealed by an XFEL source