Stacking transformation and defect creation in Cs intercalated TiS2 singlecrystals

The intercalation of TiS2 single crystals with Cs was studied by transmissi on electron microscopy. Evidence was found for an intercalation induced 1T- ->3R structure transformation. The Cs+ ions formed an a root 3 x a root 3 s tructure. In the thinnest parts of the crystals, the intercalation induced cracks and moire fringes. In thicker parts the 1T-->3R transformation was f rustrated, with formation of intercalation ribbons and dislocation loops. A ir exposure resulted in de-intercalation and oxidation of Cs. The results e mphasise the connections between defects and intercalation. (C) 1999 Elsevi er Science B.V. All rights reserved.