The layered metal Ti2PTe2

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Frauke Philipp - , TUD Dresden University of Technology (Author)
  • Peer Schmidt - , TUD Dresden University of Technology (Author)
  • Michael Ruck - , Chair of Inorganic Chemistry II, TUD Dresden University of Technology (Author)
  • Walter Schnelle - , Max Planck Institute for Chemical Physics of Solids (Author)
  • Anna Isaeva - , Lomonosov Moscow State University (Author)

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

Original languageEnglish
Pages (from-to)2859-2863
Number of pages5
JournalJournal of solid state chemistry
Volume181
Issue number10
Publication statusPublished - Oct 2008
Peer-reviewedYes

External IDs

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

Keywords

Keywords

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