KCu 7 P 3 : A Two-Dimensional Noncentrosymmetric Metallic Pnictide
Abstract
We introduce 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 [KCu7P3]– layers with hexagonal P sheets separated by K+ ions. The structure of the layers is unique yet 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 backed 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.
- Authors:
-
[1];
[2];
[1];
[4]
- Argonne National Lab. (ANL), Lemont, IL (United States)
- Northwestern Univ., Evanston, IL (United States)
- Arizona State Univ., Tempe, AZ (United States)
- Argonne National Lab. (ANL), Lemont, IL (United States); Northwestern Univ., Evanston, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1557245
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Inorganic Chemistry
- Additional Journal Information:
- Journal Volume: 58; Journal Issue: 15; Journal ID: ISSN 0020-1669
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Rettie, Alexander J. E., Malliakas, Christos D., Botana, Antia S., Bao, Jin-Ke, Chung, Duck Young, and Kanatzidis, Mercouri G. KCu 7 P 3 : A Two-Dimensional Noncentrosymmetric Metallic Pnictide. United States: N. p., 2019.
Web. doi:10.1021/acs.inorgchem.9b01336.
Rettie, Alexander J. E., Malliakas, Christos D., Botana, Antia S., Bao, Jin-Ke, Chung, Duck Young, & Kanatzidis, Mercouri G. KCu 7 P 3 : A Two-Dimensional Noncentrosymmetric Metallic Pnictide. United States. https://doi.org/10.1021/acs.inorgchem.9b01336
Rettie, Alexander J. E., Malliakas, Christos D., Botana, Antia S., Bao, Jin-Ke, Chung, Duck Young, and Kanatzidis, Mercouri G. Mon .
"KCu 7 P 3 : A Two-Dimensional Noncentrosymmetric Metallic Pnictide". United States. https://doi.org/10.1021/acs.inorgchem.9b01336. https://www.osti.gov/servlets/purl/1557245.
@article{osti_1557245,
title = {KCu 7 P 3 : A Two-Dimensional Noncentrosymmetric Metallic Pnictide},
author = {Rettie, Alexander J. E. and Malliakas, Christos D. and Botana, Antia S. and Bao, Jin-Ke and Chung, Duck Young and Kanatzidis, Mercouri G.},
abstractNote = {We introduce 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 [KCu7P3]– layers with hexagonal P sheets separated by K+ ions. The structure of the layers is unique yet 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 backed 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.},
doi = {10.1021/acs.inorgchem.9b01336},
journal = {Inorganic Chemistry},
number = 15,
volume = 58,
place = {United States},
year = {2019},
month = {7}
}
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Figure 1: a) SEM image of a KCu7P3 crystal illustrating a plate-like morphology. b) Rietveld refinement of KCu7P3 powder synthesized from the elements and washed with ethanol and water. High-resolution synchrotron XRD data were collected at 298 K. Vertical lines indicate the positions of reflections. Inset: photograph of dark greymore »
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