corner
corner
APS » Journals » Phys. Rev. Lett. » Volume 98 » Issue 16
< Previous Article | Next Article >

Phys. Rev. Lett. 98, 166403 (2007) [4 pages]

Revealing Charge Density Wave Formation in the LaTe2 System by Angle Resolved Photoemission Spectroscopy

Download: PDF (845 kB) Buy this article Export: BibTeX or EndNote (RIS)

D. R. Garcia1,2, G.-H. Gweon1,*, S. Y. Zhou1,2, J. Graf2, C. M. Jozwiak1, M. H. Jung3, Y. S. Kwon4, and A. Lanzara1,2,†
1Department of Physics, University of California, Berkeley, California 94720, USA
2Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
3National Research Laboratory for Material Science, KBSI, Daejeon 305-333, South Korea
4Department of Physics, Sung Kyun Kwan University, Suwon 440-746, South Korea

Received 20 October 2006; published 18 April 2007

We present the first direct study of charge density wave (CDW) formation in quasi-2D single layer LaTe2 using high-resolution angle resolved photoemission spectroscopy and low energy electron diffraction. CDW formation is driven by Fermi surface (FS) nesting, however, characterized by a surprisingly smaller gap (≈50  meV) than seen in the double layer RTe2 compounds, extending over the entire FS. This establishes LaTe2 as the first reported semiconducting 2D CDW system where the CDW phase is FS nesting driven. In addition, the layer dependence of this phase in the tellurides and the possible transition from a stripe to a checkerboard phase is discussed.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.166403
DOI:
10.1103/PhysRevLett.98.166403
PACS:
71.20.−b

*Present address: Department of Physics, University of California, Santa Cruz, CA, 95060, USA.

†Electronic address: alanzara@lbl.gov

 
< Previous Article | Next Article >