The layered metal Ti2PTe2

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Frauke Philipp - , Technische Universität Dresden (Autor:in)
  • Peer Schmidt - , Technische Universität Dresden (Autor:in)
  • Michael Ruck - , Professur für Anorganische Chemie (II) (AC2), Technische Universität Dresden (Autor:in)
  • Walter Schnelle - , Max-Planck-Institut für Chemische Physik fester Stoffe (Autor:in)
  • Anna Isaeva - , Lomonosov Moscow State University (Autor:in)

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

OriginalspracheEnglisch
Seiten (von - bis)2859-2863
Seitenumfang5
FachzeitschriftJournal of solid state chemistry
Jahrgang181
Ausgabenummer10
PublikationsstatusVeröffentlicht - Okt. 2008
Peer-Review-StatusJa

Externe IDs

ORCID /0000-0002-2391-6025/work/159171942

Schlagworte

Schlagwörter

  • Band structure, Crystal structure, Electrical conductivity, Titanium phosphide telluride, XANES-fluorescence