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Shi N, Fan L, Xu Y, Yin W, Chen H, Yuan B, Zhou C, Chen J. Significant Enhancement of Negative Thermal Expansion Under Low Pressure in Cu 2P 2O 7. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2312289. [PMID: 38924308 DOI: 10.1002/smll.202312289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 05/28/2024] [Indexed: 06/28/2024]
Abstract
Much effort is made to achieve the negative thermal expansion (NTE) control, but rare methods reached the improvement of intrinsic NTE. In the present work, a significantly enhanced NTE is realized in Cu2P2O7 by applying low pressure. Especially, the volumetric coefficient of thermal expansion (CTE) of Cu2P2O7 reached to -50.0 × 10-6 K-1 (150-325K) under 0.25 GPa, which is increased by 47.5% compared to its NTE in a similar temperature range under atmosphere pressure. This character enables a more effective manifestation of the thermal compensation role of Cu2P2O7 in composites. The enhanced NTE mechanisms are analyzed by high pressure synchrotron X-ray diffraction, neutron diffraction at variable temperature and pressure, as well as density functional theory (DFT) calculations. The results show that applied pressure accelerates the contraction of the distance between adjacent CuO layers and CuO columns. Meanwhile, the low-frequency phonon contribution to NTE in α-Cu2P2O7 is improved. This work is meaningful for the exploration of methods to enhance NTE and the practical application of NTE materials.
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Affiliation(s)
- Naike Shi
- Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
| | - Longlong Fan
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
- Spallation Neutron Source Science Center, Dalang, Dongguan, 523803, China
| | - Yuanji Xu
- Institute for Applied Physics, University of Science and Technology Beijing, Beijing, 100083, China
| | - Wen Yin
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
- Institute for Applied Physics, University of Science and Technology Beijing, Beijing, 100083, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Huaican Chen
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
- Institute for Applied Physics, University of Science and Technology Beijing, Beijing, 100083, China
| | - Bao Yuan
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
- Institute for Applied Physics, University of Science and Technology Beijing, Beijing, 100083, China
| | - Chang Zhou
- Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
- State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China
| | - Jun Chen
- Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, 100083, China
- Hainan University, Haikou, Hainan Province, 570228, China
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2
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Stoppelman JP, Wilkinson AP, McDaniel JG. Equation of state predictions for ScF3 and CaZrF6 with neural network-driven molecular dynamics. J Chem Phys 2023; 159:084707. [PMID: 37638627 DOI: 10.1063/5.0157615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 08/09/2023] [Indexed: 08/29/2023] Open
Abstract
In silico property prediction based on density functional theory (DFT) is increasingly performed for crystalline materials. Whether quantitative agreement with experiment can be achieved with current methods is often an unresolved question, and may require detailed examination of physical effects such as electron correlation, reciprocal space sampling, phonon anharmonicity, and nuclear quantum effects (NQE), among others. In this work, we attempt first-principles equation of state prediction for the crystalline materials ScF3 and CaZrF6, which are known to exhibit negative thermal expansion (NTE) over a broad temperature range. We develop neural network (NN) potentials for both ScF3 and CaZrF6 trained to extensive DFT data, and conduct direct molecular dynamics prediction of the equation(s) of state over a broad temperature/pressure range. The NN potentials serve as surrogates of the DFT Hamiltonian with enhanced computational efficiency allowing for simulations with larger supercells and inclusion of NQE utilizing path integral approaches. The conclusion of the study is mixed: while some equation of state behavior is predicted in semiquantitative agreement with experiment, the pressure-induced softening phenomenon observed for ScF3 is not captured in our simulations. We show that NQE have a moderate effect on NTE at low temperature but does not significantly contribute to equation of state predictions at increasing temperature. Overall, while the NN potentials are valuable for property prediction of these NTE (and related) materials, we infer that a higher level of electron correlation, beyond the generalized gradient approximation density functional employed here, is necessary for achieving quantitative agreement with experiment.
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Affiliation(s)
- John P Stoppelman
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA
| | - Angus P Wilkinson
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, USA
| | - Jesse G McDaniel
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA
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3
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Machado Ferreira de Araujo F, Duarte-Ruiz D, Saßnick HD, Gentzmann MC, Huthwelker T, Cocchi C. Electronic Structure and Core Spectroscopy of Scandium Fluoride Polymorphs. Inorg Chem 2023; 62:4238-4247. [PMID: 36858964 PMCID: PMC10015455 DOI: 10.1021/acs.inorgchem.2c04357] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
Microscopic knowledge of the structural, energetic, and electronic properties of scandium fluoride is still incomplete despite the relevance of this material as an intermediate for the manufacturing of Al-Sc alloys. In a work based on first-principles calculations and X-ray spectroscopy, we assess the stability and electronic structure of six computationally predicted ScF3 polymorphs, two of which correspond to experimentally resolved single-crystal phases. In the theoretical analysis based on density functional theory (DFT), we identify similarities among the polymorphs based on their formation energies, charge-density distribution, and electronic properties (band gaps and density of states). We find striking analogies between the results obtained for the low- and high-temperature phases of the material, indirectly confirming that the transition occurring between them mainly consists of a rigid rotation of the lattice. With this knowledge, we examine the X-ray absorption spectra from the Sc and F K-edge contrasting first-principles results obtained from the solution of the Bethe-Salpeter equation on top of all-electron DFT with high-energy-resolution fluorescence detection measurements. Analysis of the computational results sheds light on the electronic origin of the absorption maxima and provides information on the prominent excitonic effects that characterize all spectra. A comparison with measurements confirms that the sample is mainly composed of the high- and low-temperature polymorphs of ScF3. However, some fine details in the experimental results suggest that the probed powder sample may contain defects and/or residual traces of metastable polymorphs.
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Affiliation(s)
| | - Daniel Duarte-Ruiz
- Institute of Physics, Carl-von-Ossietzky Universität Oldenburg, 26129 Oldenburg, Germany
| | | | - Marie C Gentzmann
- Bundesanstalt für Materialforschung und-prüfung, Unter den Eichen 87, 12205 Berlin, Germany
| | - Thomas Huthwelker
- Swiss Light Source (SLS), Paul Scherrer Institut (PSI), 5232 Villigen, Switzerland
| | - Caterina Cocchi
- Institute of Physics, Carl-von-Ossietzky Universität Oldenburg, 26129 Oldenburg, Germany.,Physics Department and IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
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4
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Qin F, Wang X, Hu L, Jia N, Gao Z, Aydemir U, Chen J, Ding X, Sun J. Switch of Thermal Expansions Triggered by Itinerant Electrons in Isostructural Metal Trifluorides. Inorg Chem 2022; 61:21004-21010. [PMID: 36520116 DOI: 10.1021/acs.inorgchem.2c03499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Manageable thermal expansion (MTE) of metal trifluorides can be achieved by introducing local structure distortion (LSD) in the negative thermal expansion ScF3. However, an open issue is why isostructural TiF3, free of LSD, exhibits positive thermal expansion. Herein, a combined analysis of synchrotron X-ray diffraction, X-ray pair distribution function, and rigorous first-principles calculations was performed to reveal the important role of itinerant electrons in mediating soft phonons and lattice dynamics. Metallic TiF3 demonstrates itinerant electrons and a suppressed Grüneisen parameter γ ≈ -20, while insulating ScF3 absence of itinerant electrons has a considerable γ ≈ -120. With increasing electron doping concentrations in ScF3, soft phonons become hardened and the γ is repressed significantly, identical to TiF3. The presented results update the thermal expansion transition mechanism in framework structure analogues and provide a practical approach to obtaining MTE without inducing sizable structure distortion.
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Affiliation(s)
- Feiyu Qin
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Xiaoying Wang
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Lei Hu
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Ning Jia
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Zhibin Gao
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Umut Aydemir
- Department of Chemistry, Koç University, Sariyer, Istanbul 34450, Turkey.,Koç University Boron and Advanced Materials Application and Research Center (KUBAM), Sariyer, Istanbul 34450, Turkey
| | - Jun Chen
- Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, China
| | - Xiangdong Ding
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jun Sun
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
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5
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Alabarse F, Baptiste B, Joseph B, Haines J. Tuning Negative Thermal Expansion in AlPO 4-17 by Insertion of Guest Molecules. J Phys Chem Lett 2022; 13:9390-9395. [PMID: 36190798 DOI: 10.1021/acs.jpclett.2c02718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The very strong negative thermal expansion in the porous aluminophosphate AlPO4-17 with a hexagonal erionite structure was tuned by the insertion of oxygen molecules at high pressure. The structure of the oxygen-filled material was determined in situ at high pressure by synchrotron, single-crystal X-ray diffraction. The thermal expansion of this material was measured precisely at 0.38 GPa by synchrotron X-ray powder diffraction. Whereas the overall volume thermal expansion only exhibits a small change with respect to empty AlPO4-17 at ambient pressure, the expansion along the a direction decreases almost to zero and the expansion along c increases by a factor of 7. Such highly anisotropic thermal expansion properties are of great interest for mechanical and optical applications as in two directions the dimensions of the material are extremely stable, whereas a very strong linear negative thermal expansion of -2.2 × 10-5 K-1 is observed in the perpendicular direction. Guest insertion is thus a very powerful tool for tuning the thermal expansion properties of porous materials.
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Affiliation(s)
| | - Benoît Baptiste
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, (IMPMC), UMR 7590 CNRS - Sorbonne Université - IRD - MNHN, 4 place Jussieu, 75252 Cedex 5 Paris, France
| | - Boby Joseph
- Elettra Sincrotrone Trieste, Trieste 34149, Italy
| | - Julien Haines
- Institut Charles Gerhardt Montpellier, CNRS, Université de Montpellier, ENSCM, 34293 Montpellier, France
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6
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Jiao Y, Gao Q, Sanson A, Liang E, Sun Q, Chen J. Understanding Large Negative Thermal Expansion of NdFe(CN) 6 through the Electronic Structure and Lattice Dynamics. Inorg Chem 2022; 61:7813-7819. [PMID: 35543502 DOI: 10.1021/acs.inorgchem.2c00310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A large negative thermal expansion (NTE) (αv = -4.1 × 10-5 K-1, 100-525 K) has been discovered in NdFe(CN)6. Here, the synchrotron X-ray diffraction and lattice dynamics calculations using the density functional theory were conducted to understand the NTE in NdFe(CN)6. The information obtained on the bond nature of the Nd-N≡C-Fe linkage and on the atomic thermal vibrations suggests that the transverse vibrations of the -N≡C- group, in particular from N atoms, produced the NTE in NdFe(CN)6. This is corroborated by the calculated Grüneisen parameters, which confirm the relationship between NTE and CN atomic vibrations. The results provide a helpful contribution toward the realization of new materials with negative or controllable thermal expansion.
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Affiliation(s)
- Yixin Jiao
- Key Laboratory of Materials Physics of Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
| | - Qilong Gao
- Key Laboratory of Materials Physics of Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
| | - Andrea Sanson
- Department of Physics and Astronomy, University of Padova, Padova I-35131, Italy
| | - Erjun Liang
- Key Laboratory of Materials Physics of Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
| | - Qiang Sun
- Key Laboratory of Materials Physics of Ministry of Education, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
| | - Jun Chen
- Beijing Advanced Innovation Center for Materials Genome Engineering, Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, China
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7
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Shi N, Song Y, Xing X, Chen J. Negative thermal expansion in framework structure materials. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214204] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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8
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Wang C, Chang D, Wang J, Gao Q, Zhang Y, Niu C, Liu C, Jia Y. Size and crystal symmetry breaking effects on negative thermal expansion in ScF 3 nanostructures. Phys Chem Chem Phys 2021; 23:24814-24822. [PMID: 34714310 DOI: 10.1039/d1cp02809j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nowadays, one of the most typical and important potential applications of negative thermal expansion (NTE) materials is to prepare zero thermal expansion or controllable coefficient thermal expansion materials by compounding them with positive thermal expansion materials. The research on NTE properties at the nanoscales is the basis and premise for the realization of high-quality composites. Here, using first-principles calculations, we take a typical open framework material ScF3 as an example to study a new NTE mechanism at the nanoscale, which involves edge and size effects, as well as crystal symmetry breaking. By analyzing the vibrational modes in ultrathin ScF3 films, three effects contributing to the NTE properties are identified, namely, the acoustic mode (ZA mode) induced by surface truncation, the enhanced rotations of ScF6 octahedra in the surface layer and the suppressed rotations of ScF6 octahedra in the inner layer due to crystal symmetry breaking. With increasing thickness, the effect of the ZA mode vibration gradually weakens, while the rotations of the ScF6 octahedra in the surface and inner layers are enhanced. Ultimately, the approximately mutual compensation of these three effects makes the NTE coefficients of different thicknesses almost unchanged. Finally, we simply generalize our conclusions to zero dimensional nanoparticles. This work reveals a new NTE mechanism in low-dimensional open framework materials, which serves as a guide in designing NTE materials at the nanoscale.
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Affiliation(s)
- Chunyan Wang
- International Laboratory for Quantum Functional Materials of Henan, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China.,Key Laboratory for Special Functional Materials of Ministry of Education, and School of Materials and Engineering, Henan University, Kaifeng 475001, China
| | - Dahu Chang
- Department of Mathematics and Physics, Luoyang Institute of Science and Technology, Luoyang 471023, China
| | - Junfei Wang
- College of Science, Henan University of Technology, Zhengzhou 450001, China
| | - Qilong Gao
- International Laboratory for Quantum Functional Materials of Henan, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
| | - Yinuo Zhang
- International Laboratory for Quantum Functional Materials of Henan, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
| | - Chunyao Niu
- International Laboratory for Quantum Functional Materials of Henan, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
| | - Chengyan Liu
- Key Laboratory for Special Functional Materials of Ministry of Education, and School of Materials and Engineering, Henan University, Kaifeng 475001, China
| | - Yu Jia
- International Laboratory for Quantum Functional Materials of Henan, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China.,Key Laboratory for Special Functional Materials of Ministry of Education, and School of Materials and Engineering, Henan University, Kaifeng 475001, China
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9
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Zaliznyak IA, Bozin E, Tkachenko AV. Comment on "Colossal Pressure-Induced Softening in Scandium Fluoride". PHYSICAL REVIEW LETTERS 2021; 126:179601. [PMID: 33988444 DOI: 10.1103/physrevlett.126.179601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 03/11/2021] [Indexed: 06/12/2023]
Affiliation(s)
- I A Zaliznyak
- Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - E Bozin
- Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - A V Tkachenko
- CFN, Brookhaven National Laboratory, Upton, New York 11973, USA
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10
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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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