Issue 20, 2021

Synthesis and characterization of a new family of layered PbxSn4−xAs3 alloys

Abstract

Layered two-dimensional (2D) materials have attracted considerable interest for their exotic and anisotropic electronic behavior. One such material, Sn4As3, bears a resemblance in both structure and elemental composition to two other Sn- and As-containing layered materials that have recently demonstrated axis-dependent conduction polarity: NaSn2As2 and NaSnAs. Here, a new family of Pb-alloyed PbxSn4−xAs3 crystals was synthesized and the axis-dependent electronic and thermoelectric properties were evaluated. Up to one full equivalent of Pb could be alloyed into PbxSn4−xAs3 (0 < x < 1.06) before phase separation occurred. We establish the structural changes and the trends in the Raman spectra with increasing Pb substitution. These materials all exhibit metallic temperature-dependent resistivities and positive thermopowers along the in-plane and cross-plane directions. The absence of axis-dependent conduction polarity in these SnAs-layered materials is consistent with theoretical predictions, and illustrates that precise control over the atomic and electronic structure and doping is essential for realizing this phenomenon in new materials.

Graphical abstract: Synthesis and characterization of a new family of layered PbxSn4−xAs3 alloys

Supplementary files

Article information

Article type
Paper
Submitted
21 Feb 2021
Accepted
28 Apr 2021
First published
28 Apr 2021

J. Mater. Chem. C, 2021,9, 6477-6483

Synthesis and characterization of a new family of layered PbxSn4−xAs3 alloys

K. G. Koster, Y. Wang, M. R. Scudder, C. E. Moore, W. Windl and J. E. Goldberger, J. Mater. Chem. C, 2021, 9, 6477 DOI: 10.1039/D1TC00842K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements