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Influence of 2s Bloch wave state excitations on quantitative HAADF STEM imaging

Wouters, C; Markurt, T; Albrecht, M; Rotunno, Enzo; Grillo, Vincenzo


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{
  "DOI": "10.1103/PhysRevB.100.184106", 
  "author": [
    {
      "family": "Wouters, C"
    }, 
    {
      "family": "Markurt, T"
    }, 
    {
      "family": "Albrecht, M"
    }, 
    {
      "family": "Rotunno, Enzo"
    }, 
    {
      "family": "Grillo, Vincenzo"
    }
  ], 
  "issued": {
    "date-parts": [
      [
        2020, 
        5, 
        20
      ]
    ]
  }, 
  "abstract": "<p>In this paper the influence of 2s Bloch wave states on high angle annular dark field image contrast is studied<br>\nquantitatively by Bloch wave and multislice simulations. We show that 2s states are excited beyond a critical Z<br>\nvalue and cause a long period oscillation of the electron probe wave function that significantly influences the Z<br>\ncontrast. As a result, we find that the Z contrast for high Z alloys remains thickness dependent up to high sample<br>\nthicknesses and this effect has to be considered for compositional analysis. In the special case of ordered alloys,<br>\nthe impact of 2s excitations on intensity provides a way to quantify long-range order phenomena in alloys with<br>\nknown composition.</p>", 
  "title": "Influence of 2s Bloch wave state excitations on quantitative HAADF STEM imaging", 
  "type": "article", 
  "id": "3836143"
}
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