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Rational design of materials with extreme negative compressibility: selective soft-mode frustration in KMn[Ag(CN)2]3

Abstract:

We show that KMn[Ag(CN)₂]₃ exhibits the strongest negative linear compressibility (NLC) effect over the largest pressure range yet observed. Variable pressure neutron powder diffraction measurements reveal that its crystal lattice expands along the c axis of its trigonal cell under increasing hydrostatic pressure, while contracting along the a axis. This corresponds to a “wine-rack”-like mechanism for NLC that we find also results in anisotropic negative thermal expansion (NTE) in the same ma...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1021/ja204908m

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Institution:
University of Oxford
Division:
MPLS
Department:
Chemistry
Sub department:
Inorganic Chemistry
Research group:
Goodwin Group
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Chemistry
Sub department:
Inorganic Chemistry
Research group:
Chemical Crystallography
Role:
Author
More by this author
Institution:
Rutherford Appleton Laboratory, ISIS Facility
Role:
Author
More by this author
Institution:
Institut Charles Gerhardt, UMR CNRS 5253, Université Montpellier II
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Chemistry
Sub department:
Inorganic Chemistry
Research group:
Goodwin Group
Role:
Author
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Funding agency for:
Haines, J
Grant:
ANR-09-BLAN-0018-01
More from this funder
Funding agency for:
Goodwin, A
Grant:
EP/G004528/2
Publisher:
American Chemical Society Publisher's website
Journal:
Journal of the American Chemical Society Journal website
Volume:
134
Issue:
10
Pages:
4454–4456
Publication date:
2012-03-01
DOI:
EISSN:
1520-5126
ISSN:
0002-7863
Language:
English
Keywords:
Subjects:
UUID:
uuid:78f8f701-41a7-4626-bdb4-646d92c5136f
Local pid:
ora:7496
Deposit date:
2013-10-23

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