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STM Studies of TbTe3: Evidence for a fully Incommensurate Charge Density Wave

A. Fang·N. Ru·I. R. Fisher·A. Kapitulnik
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Abstract

We observe unidirectional charge density wave ordering on the cleaved surface of TbTe3 with a Scanning Tunneling Microscope at ~6 K. The modulation wave-vector q_{CDW} as determined by Fourier analysis is 0.71 +/- 0.02 * 2 pi/c. (Where c is one edge of the in-plane 3D unit cell.) Images at different tip-sample voltages show the unit cell doubling effects of dimerization and the layer below. Our results agree with bulk X-ray measurements, with the addition of ~(1/3) * 2 pi/a ordering perpendicular to the CDW. Our analysis indicates that the CDW is incommensurate.

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A. Fang, N. Ru, I. R. Fisher, A. Kapitulnik. 2007-01-19. STM Studies of TbTe3: Evidence for a fully Incommensurate Charge Density Wave. https://doi.org/10.1103/physrevlett.99.046401

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