Fig. 1: Crystal Structure, Fermi Surface, Topography, and dI/dV Spectra.
From: Atomic-scale visualization of a cascade of magnetic orders in the layered antiferromagnet GdTe3
a Crystal structure of GdTe3, with a top view of the GdTe surface shown to the right. b Sketch of Fermi surface. The shaded areas are a schematic representation of Fermi surface gapping associated with the unidirectional CDW. c Large-area (800 Å × 800 Å, VBias = −120 mV, ISet = 240 pA) and atomic-resolution (top right inset, 6 Å × 3.75 Å, VBias = −400 mV, ISet = 120 pA) topographies of cleaved GdTe3. All topographies in this manuscript are shown with a linear plane subtracted. d FT of the large-area W tip scan in c, with the CDW and Bragg peaks labeled as well as quasiparticle interference (QPI) bands observed. The QPI bands in the CDW direction (along qb) are gapped out. This FT has been mirror-symmetrized and had a first nearest-neighbor averaging applied. e Line profile along the blue arrow shown in d. The x-axis is the length in Fourier space in units of (2π/b). All data shown in this figure were taken at 4 K.
