Details

Autor(en) / Beteiligte

• Bludská, J.
• Karamazov, S.
• Navrátil, J.
• Jakubec, I.
• Horák, J.

Titel

Copper intercalation into Bi2Te3 single crystals

Ist Teil von

• Solid state ionics, 2004-07, Vol.171 (3-4), p.251-259

Erscheinungsjahr

2004

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The process of electrochemical intercalation and deintercalation of copper ions into Bi2Te3 single crystals was studied and a conception of embedding of copper ions into octahedral and tetrahedral sites of the van der Waals gaps was proposed. Taking the lattice-gas model into consideration, values of octahedral and tetrahedral site energies, E1=-0.07 eV and E2=-0.31 eV, were determined. It was found that intercalated copper ions behave either as donors located in the van der Waals gaps and interstitial sites of five-plane layers of the crystal or as inactive species. To enlighten this effect, a model assuming an interaction of Cu+ ions with Te1 atomic planes and the formation of uncharged four-layer lamellae (Cu-Te-Bi-Te) and seven-layer lamellae carrying delocalised negative charge (Bi3Te4)- was proposed.