Rettie, AJE;
Malliakas, CD;
Botana, AS;
Bao, J-K;
Chung, DY;
Kanatzidis, MG;
(2019)
KCu₇P₃: A Two-Dimensional Noncentrosymmetric Metallic Pnictide.
Inorganic Chemistry
, 58
(15)
pp. 10201-10208.
10.1021/acs.inorgchem.9b01336.
Preview |
Text
062519_MS_KCu7P3_revised_clean.pdf - Accepted Version Download (3MB) | Preview |
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.
| Type: | Article |
|---|---|
| Title: | KCu₇P₃: A Two-Dimensional Noncentrosymmetric Metallic Pnictide |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acs.inorgchem.9b01336 |
| Publisher version: | https://doi.org/10.1021/acs.inorgchem.9b01336 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Crystals, Potassium, Granular materials, Crystal structure, Physical and chemical processes |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10078819 |
Archive Staff Only
 |
View Item |
