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Predicting and Synthesizing Interface Stabilized 2D Layers

Journal Article · · Chemistry of Materials
 [1];  [2];  [3];  [2];  [1];  [4];  [1]
  1. Univ. of Oregon, Eugene, OR (United States). Materials Science Inst.
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Inst. for Materials Science
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
The compound (Pb2MnSe3)0.6VSe2 was predicted to be kinetically stable based on density functional theory (DFT) calculations on an island of Pb2MnSe3 between layers of VSe2. This approach provides a high degree of freedom by not forcing interlayer lattice match, making it ideal to investigate the likelihood of formation of new incommensurate layer misfit structures. The free space around the island is critical, as it allows atoms to diffuse and hence exploring the local energy landscape around the initial configuration. (Pb2MnSe3)0.6VSe2 was synthesized via a near diffusionless reaction from precursors where a repeating sequence of elemental layers matches the local composition and layer sequence of the predicted compound. The VSe2 layer consists of a Se–V–Se trilayer with octahedral coordination of the V atoms. The Pb2MnSe3 layer consists of three rock-salt-like planes, with a MnSe layer between the planes of PbSe. The center MnSe plane stabilizes the puckering of the outer PbSe layers. Electrical properties indicate that (Pb2Mn1Se3)0.6VSe2 undergoes a charge density wave transition at ~100 K and orders ferromagnetically at 35 K. Overall, the combination of theory and experiment enables a faster convergence to new heterostructures than either approach in isolation.
Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
Grant/Contract Number:
89233218CNA000001; AC04-94AL85000; AC52-06NA25396; NA0003525
OSTI ID:
1810374
Report Number(s):
SAND--2021-7760J; 697236
Journal Information:
Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 13 Vol. 33; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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