Scanning tunneling microscopy study of the CeTe3 charge density wave

Abstract

We have studied the nature of the surface charge distribution in CeTe3. This is a simple, cleavable, layered material with a robust one-dimensional incommensurate charge density wave (CDW). Scanning tunneling microscopy (STM) has been applied on the exposed surface of a cleaved single crystal. At 77 K, the STM images show both the atomic lattice of surface Te atoms arranged in a square net and the CDW modulations oriented at 45 degrees with respect to the Te net. Fourier transform of the STM data shows Te square lattice peaks, and peaks related to the CDW oriented at 45 degrees to the lattice peaks. In addition, clear peaks are present, consistent with subsurface structure and wave vector mixing effects. These data are supported by electronic structure calculations, which show that the subsurface signal most likely arises from a lattice of Ce atoms situated 2.53 angstroms below the surface Te net.

7 pages, 8 figures

References in corpus (5)

• Fermi Surface reconstruction in the CDW state of CeTe3 observed by photoemission
• Fermi surface nesting and charge-density wave formation in rare-earth tritellurides
• Scanning Tunneling Microscopy of Defect States in the Semiconductor Bi${}_2$Se${}_3$
• STM Studies of TbTe3: Evidence for a fully Incommensurate Charge Density Wave
• Local atomic structure and discommensurations in the charge density wave of CeTe3

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• Multiple Charge Density Wave States at the Surface of TbTe${}_3$
• Charge density wave modulation and gap measurements in CeTe${}_3$
• Interplay of Charge Density Wave States and Strain at the Surface of CeTe${}_2$
• Melting of unidirectional charge density waves across twin domain boundaries in GdTe${}_3$
• Revealing Pronounced Electron-Hole Fermi Pockets in the Charge Density Wave Semimetal LaTe3
• Kondo-coupled van der Waals antiferromagnet with high-mobility quasiparticles
• Uncovering hidden Fermi surface instabilities through visualizing unconventional quasiparticle interference in CeTe3
• Interplay of Kondo Physics with Incommensurate Charge Density Waves in CeTe${}_3$