Abstract
We report a 2D material, KCu7P3, with a noncentrosymmetric structure (trigonal space group P31m, a = 6.9637(2) Å, c = 24.1338 (10) Å), which forms both from a molten potassium polyphosphide flux and from the elements. This phase consists of infinite [Cu7P3]- layers with hexagonal P sheets separated by K+ ions. The structure of the layers is unique but related to both Cu3P and the CaCu4P2 structure-types. Single-crystal refinement reveals extensive disorder within the Cu3P-like slabs. KCu7P3 is paramagnetic and exhibits a room temperature resistivity of ∼335 μω cm with a metal-like temperature dependence. The metallic character is supported by density functional theory electronic structure calculations. Hall and Seebeck effect measurements yield p-type behavior with a hole mobility of ∼15 cm2 V-1 s-1 at 300 K and a carrier concentration on the order of 1021 cm-3. KCu7P3 is chemically stable in ambient conditions, as well as in aqueous neutral and acidic solutions.
Original language | English (US) |
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Pages (from-to) | 10201-10208 |
Number of pages | 8 |
Journal | Inorganic chemistry |
Volume | 58 |
Issue number | 15 |
DOIs | |
State | Published - Aug 5 2019 |
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry
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CSD 1915750: Experimental Crystal Structure Determination
Rettie, A. J. E. (Contributor), Malliakas, C. D. (Contributor), Sanchez Botana, A. (Contributor), Bao, J. (Contributor), Chung, D. Y. (Contributor), Kanatzidis, M. G. (Contributor), Chung, D. Y. (Contributor) & Kanatzidis, M. G. (Contributor), The Cambridge Structural Database, 2019
DOI: 10.25505/fiz.icsd.cc229hd9, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.25505/fiz.icsd.cc229hd9&sid=DataCite
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