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Li L, Refson K, Dove MT. Negative thermal expansion of cubic silicon dicarbodiimide, Si(NCN) 2, studied by ab initiolattice dynamics. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:465402. [PMID: 32702671 DOI: 10.1088/1361-648x/aba8cb] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 07/23/2020] [Indexed: 06/11/2023]
Abstract
We report anab initiocalculation of crystal structure and lattice dynamics of cubic silicon dicarbodiimide, Si(NCN)2, using density functional theory methods. The calculations reveal a low-energy spectrum of rigid unit modes that are shown to be associated with negative thermal expansion. Comparisons are drawn with the closely-related materials Zn(CN)2and the cubic-cristobalite phase of SiO2. Instabilities in the spectrum of rigid unit modes point to the existence of disorder of the positions and orientations of the dicarbodiimide molecular anions.
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Affiliation(s)
- Li Li
- College of Physics, Sichuan University, Chengdu, Sichuan 610065, People's Republic of China
- College of Computer Science and Technology, Civil Aviation Flight University of China, 46 Nanchang Road, Guanghan, Sichuan, 618307, People's Republic of China
| | - Keith Refson
- Department of Physics, Royal Holloway University of London, Egham Hill, Egham, Surrey, TW20 0EX, United Kingdom
- ISIS Neutron and Muon Facility, Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxfordshire, OX11 0QX, United Kingdom
| | - Martin T Dove
- College of Computer Science, Sichuan University, Chengdu, Sichuan 610065, People's Republic of China
- Department of Physics, School of Sciences, Wuhan University of Technology, 205 Luoshi Road, Hongshan District, Wuhan, Hubei 430070, People's Republic of China
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Gao Q, Shi N, Sun Q, Sanson A, Milazzo R, Carnera A, Zhu H, Lapidus SH, Ren Y, Huang Q, Chen J, Xing X. Low-Frequency Phonon Driven Negative Thermal Expansion in Cubic GaFe(CN) 6 Prussian Blue Analogues. Inorg Chem 2018; 57:10918-10924. [PMID: 30106577 DOI: 10.1021/acs.inorgchem.8b01526] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The understanding of the negative thermal expansion (NTE) mechanism is vital not only for the development of new NTE compounds but also for effectively controlling thermal expansion. Here, we report an interesting isotropic NTE property in cubic GaFe(CN)6 Prussian blue analogues (α l = -3.95 × 10-6 K-1, 100-475 K), which is a new example to understand the complex NTE mechanism. A combined study of synchrotron X-ray diffraction, X-ray total scattering, X-ray absorption fine structure, neutron powder diffraction, and density functional theory calculations shows that the NTE of GaFe(CN)6 originates from the low-frequency phonons (< ∼100 cm-1), which are directly related to the transverse vibrations of the atomic -Ga-N≡C-Fe- chains. Both the Ga-N and Fe-C chemical bonds are much softer to bend than to stretch. The direct evidence that transverse vibrational contribution to the NTE of GaFe(CN)6 is dominated by N, instead of C atoms, is illustrated. It is interesting to find that the polyhedra of GaFe(CN)6 are not rigid, which is a starting assumption in some models describing the NTE properties of other systems. The NTE mechanism can be vividly described by the "guitar-string" effect, which would be the common feature for the NTE property of many open-framework functional materials, such as Prussian blue analogues, oxides, cyanides, metal-organic frameworks, and zeolites.
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Affiliation(s)
- Qilong Gao
- Beijing Advanced Innovation Center for Materials Genome Engineering , University of Science and Technology Beijing , Beijing 100083 , China.,Department of Physical Chemistry , University of Science and Technology Beijing , Beijing 100083 , China
| | - Naike Shi
- Beijing Advanced Innovation Center for Materials Genome Engineering , University of Science and Technology Beijing , Beijing 100083 , China.,Department of Physical Chemistry , University of Science and Technology Beijing , Beijing 100083 , China
| | - Qiang Sun
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Engineering , Zhengzhou University , Zhengzhou 450001 , China
| | - Andrea Sanson
- Department of Physics and Astronomy , University of Padova , Padova I-35131 , Italy
| | - Ruggero Milazzo
- Department of Physics and Astronomy , University of Padova , Padova I-35131 , Italy
| | - Alberto Carnera
- Department of Physics and Astronomy , University of Padova , Padova I-35131 , Italy
| | - He Zhu
- Beijing Advanced Innovation Center for Materials Genome Engineering , University of Science and Technology Beijing , Beijing 100083 , China.,Department of Physical Chemistry , University of Science and Technology Beijing , Beijing 100083 , China
| | - Saul H Lapidus
- Argonne National Laboratory , X-ray Science Division , Argonne , Illinois 60439 , United States
| | - Yang Ren
- Argonne National Laboratory , X-ray Science Division , Argonne , Illinois 60439 , United States
| | - Qingzhen Huang
- NIST Center for Neutron Research , National Institute of Standards and Technology , Gaithersburg , Maryland 20899-6102 , United States
| | - Jun Chen
- Beijing Advanced Innovation Center for Materials Genome Engineering , University of Science and Technology Beijing , Beijing 100083 , China.,Department of Physical Chemistry , University of Science and Technology Beijing , Beijing 100083 , China
| | - Xianran Xing
- Beijing Advanced Innovation Center for Materials Genome Engineering , University of Science and Technology Beijing , Beijing 100083 , China.,Department of Physical Chemistry , University of Science and Technology Beijing , Beijing 100083 , China
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Dove MT, Fang H. Negative thermal expansion and associated anomalous physical properties: review of the lattice dynamics theoretical foundation. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2016; 79:066503. [PMID: 27177210 DOI: 10.1088/0034-4885/79/6/066503] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Negative thermal expansion (NTE) is the phenomenon in which materials shrink rather than expand on heating. Although NTE had been previously observed in a few simple materials at low temperature, it was the realisation in 1996 that some materials have NTE over very wide ranges of temperature that kick-started current interest in this phenomenon. Now, nearly two decades later, a number of families of ceramic NTE materials have been identified. Increasingly quantitative studies focus on the mechanism of NTE, through techniques such as high-pressure diffraction, local structure probes, inelastic neutron scattering and atomistic simulation. In this paper we review our understanding of vibrational mechanisms of NTE for a range of materials. We identify a number of different cases, some of which involve a small number of phonons that can be described as involving rotations of rigid polyhedral groups of atoms, others where there are large bands of phonons involved, and some where the transverse acoustic modes provide the main contribution to NTE. In a few cases the elasticity of NTE materials has been studied under pressure, identifying an elastic softening under pressure. We propose that this property, called pressure-induced softening, is closely linked to NTE, which we can demonstrate using a simple model to describe NTE materials. There has also been recent interest in the role of intrinsic anharmonic interactions on NTE, particularly guided by calculations of the potential energy wells for relevant phonons. We review these effects, and show how anhamonicity affects the response of the properties of NTE materials to pressure.
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Affiliation(s)
- Martin T Dove
- School of Physics and Astronomy, and Materials Research Institute, Queen Mary University of London, Mile End Road, London E1 4NS, UK
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Itoi M, Jike T, Nishio-Hamane D, Udagawa S, Tsuda T, Kuwabata S, Boukheddaden K, Andrus MJ, Talham DR. Direct Observation of Short-Range Structural Coherence During a Charge Transfer Induced Spin Transition in a CoFe Prussian Blue Analogue by Transmission Electron Microscopy. J Am Chem Soc 2015; 137:14686-93. [DOI: 10.1021/jacs.5b08242] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Miho Itoi
- Division
of Physics, Institute of Liberal Education, Nihon University School of Medicine, Tokyo 173-8610, Japan
| | - Toyoharu Jike
- Division
of Physics, Institute of Liberal Education, Nihon University School of Medicine, Tokyo 173-8610, Japan
| | | | - Seiichi Udagawa
- Division
of Physics, Institute of Liberal Education, Nihon University School of Medicine, Tokyo 173-8610, Japan
| | - Tetsuya Tsuda
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Susumu Kuwabata
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Kamel Boukheddaden
- Groupe
d’Etudes de la Matière Condensée, UMR 8635, CNRS-Université de Versailles Saint-Quentin-en-Yvelines, 45 Avenue des Etats Unis, 78035 Versailles, France
| | - Matthew J. Andrus
- Department
of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, United States
| | - Daniel R. Talham
- Department
of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, United States
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