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Title: Interlaced crystals having a perfect Bravais lattice and complex chemical order revealed by real-space crystallography

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms6431· OSTI ID:1185381

The search for optimal thermoelectric materials aims for structures in which the crystalline order is disrupted to lower the thermal conductivity without degradation of the electron conductivity. Here we report the synthesis and characterization of ternary nanoparticles (two cations and one anion) that exhibit a new form of crystal-line order: an uninterrupted, perfect, global Bravais lattice, in which the two cations exhibit a wide array of distinct ordering patterns within the cation sublattice, form-ing interlaced domains and phases. Partitioning into domains and phases is not unique; the corresponding boundaries have no structural defects or strain and entail no energy cost. We call this form of crystalline order “interlaced crystals” and present the example of hexagonal-CuInS2. Interlacing is possible in multi-cation tetrahedral-ly-bonded compound with an average of two electrons per bond. Interlacing has min-imal effect on electronic properties, but should strongly reduce phonon transport, making interlaced crystals attractive for thermoelectric applications.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1185381
Journal Information:
Nature Communications, Vol. 5; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

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Cited By (4)

Evolution of cation ordering and crystal defects controlled by Zn substitutions in Cu 2 SnS 3 ceramics journal October 2018
Theory-assisted determination of nano-rippling and impurities in atomic resolution images of angle-mismatched bilayer graphene journal September 2018
Catalytic and antibacterial properties of 3‐dentate carboxamide Pd/Pt complexes obtained via a benign route journal February 2020
Optoelectronic Properties of Ternary I–III–VI 2 Semiconductor Nanocrystals: Bright Prospects with Elusive Origins journal March 2019

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