The layered metal Ti2PTe2
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
Crystals of Ti2PTe2 have been synthesised by chemical vapour transport. Ti2PTe2 crystallises, isostructural to the mineral tetradymite (Bi2STe2), in the space group R3̄m with unit-cell parameters a = 3.6387(2) Å and c = 28.486(2) Å for the hexagonal setting. In the structure, layers of isolated phosphide and telluride anions form an ordered close sphere-packing with titanium cations filling two-thirds of the octahedral voids. From XANES fluorescence, the presence of Ti4+ is clearly established. In accordance with the ionic formula (Ti4+)2(P 3-)(Te2-)2(e-) metallic conductivity (ρ = 40 μΩ cm at 300 K) and nearly temperature-independent paramagnetism are found. The electronic band structure shows bands of titanium states crossing the Fermi level in directions corresponding to the ab-plane and a band gap along the c-axis.
Details
Originalsprache | Englisch |
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Seiten (von - bis) | 2859-2863 |
Seitenumfang | 5 |
Fachzeitschrift | Journal of solid state chemistry |
Jahrgang | 181 |
Ausgabenummer | 10 |
Publikationsstatus | Veröffentlicht - Okt. 2008 |
Peer-Review-Status | Ja |
Externe IDs
ORCID | /0000-0002-2391-6025/work/159171942 |
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Schlagworte
ASJC Scopus Sachgebiete
Schlagwörter
- Band structure, Crystal structure, Electrical conductivity, Titanium phosphide telluride, XANES-fluorescence