Abstract's Details

Fermi Surface Evolution Across Multiple CDW Transitions in ErTe₃
Abstract ID	MAT-02
Presenter	Rob Moore
Presentation Type	Poster
Full Author List	R. G. Moore (1,2), V. Brouet (3), R. He (1,2), J. Laverock (4), S. Dugdale (4), N. Ru (1), I. R. Fisher (1), Z. X. Shen (1,2)
Affiliations	(1) Stanford Synchrotron Radiation Laboratory, Stanford Linear Accelerator Center, Menlo Park, CA 94025 (USA) (2) Geballe Laboratory for Advanced Materials and Department of Applied Physics, Stanford University, Stanford, CA 94305 (USA) (3) Laboratoire de Physique des Solides, Universite Paris-Sud, Bat 510, UMR 8502, 91405 Orsay, France (4) H. H. Wills Physics Laboratory, University of Bristol, Bristol BS8 1TL, United Kingdom
Category	Materials Science
Abstract	The Fermi surface (FS) evolution across multiple charge density wave (CDW) transitions in ErTe₃ is investigated using angle-resolved photoemission spectroscopy. Low temperature measurements reveal two incommensurate CDW gaps created by perpendicular FS nesting vectors. A larger gap (~250 meV) arising from a CDW with q_CDW~0.7c* is in good agreement with the expected trend determined from other members of the bi-layer family of rare earth tritelluride compounds (RTe₃). A second, smaller gap (~50 meV) is due to a second CDW with q_CDW~0.7a* never before seen in other RTe₃ compounds. The temperature dependence of the FS and the two CDW gaps is characterized. Backfolded bands and FS pockets due to the CDW periodicity are identified and compared to other members of the RTe₃ family.
Footnotes
Funding Acknowledgement	This work is supported by DOE Office of Science, Division of Materials Science, with contract DE-FG03-01ER45929-A001 and NSF grant DMR-0604701.