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Published April 15, 2013 | Published
Journal Article Open

Charge transfer and multiple density waves in the rare earth tellurides

Abstract

We use high-resolution synchrotron x-ray diffraction to uncover a second, low-temperature, charge density wave (CDW) in TbTe_3. Its T_(c2) = 41.0 +/- 0.4 K is the lowest discovered so far in the rare earth telluride series. The CDW wave vectors of the high temperature and low temperature states differ significantly and evolve in opposite directions with temperature, indicating that the two nested Fermi surfaces are separated and the CDWs coexist independently. Both the in-plane and out-of-plane correlation lengths are robust, implying that the density waves on different Te layers are well coupled through the TbTe layers. Finally, we rule out any low-temperature CDW in GdTe_3 for temperatures above 8 K, an energy scale sufficiently low to make pressure tuning of incipient CDW order a realistic possibility.

Additional Information

©2013 American Physical Society. (Received 17 February 2013; revised manuscript received 9 April 2013; published 16 April 2013). The work at the University of Chicago was supported by NSF Grant No. DMR-1206519. The work at the Advanced Photon Source, Argonne National Laboratory was supported by the US Department of Energy Basic Energy Sciences under Contract No. NE-AC02-06CH11357. The work at Stanford University was supported by the DOE, Office of Basic Energy Science, under Contract No. DE-AC02-76SF00515.

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August 19, 2023
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