Fig. 2: Electron diffraction patterns of HfTe3.
From: Quasi-one-dimensional superconductivity in the pressurized charge-density-wave conductor HfTe3
Typically selected area electron diffraction (SAED) patterns taken along the [001] zone axis at a 295 K and b 26 K, respectively. The satellite spots (indicated by blue arrows) appear at low temperatures around the Bragg spots (green arrows), indicating the formation of structural modulation. c A convergent beam electron diffraction (CBED) pattern taken along the [001] zone axis, showing extra Laue zones (blue arrows) due to the structural modulation. The radial intensity distribution is plotted as an inset, with the positions of the first/second-order Laue zone (FOLZ/SOLZ) indicated by green arrows. Based on (b) and (c), the modulation vector can be determined to be q = 0.91(1) a* + 0.27(1) c*. d Intensity line profile from spot \((\bar 600)\) to \((\overline {10} 00)\) extracted from the SAED pattern (b). The intervals between different spots are labeled. e Upper panel: the geometric configuration showing the Ewald sphere intercepts points in the Laue zones. Lower panel: the intensity radial profile extracted from CBED pattern (c), from which the L values can be obtained.
