Negative thermal expansion: Mechanisms and materials

Negative thermal expansion (NTE) of materials is an intriguing phenomenon challenging the concept of traditional lattice dynamics and of importance for a variety of applications. Progresses in this field develop markedly and update continuously our knowledge on the NTE behavior of materials. In this...

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Bibliographic Details
Published in:Frontiers of physics 2021-10, Vol.16 (5), p.53302, Article 53302
Main Authors: Liang, Erjun, Sun, Qiang, Yuan, Huanli, Wang, Jiaqi, Zeng, Gaojie, Gao, Qilong
Format: Article
Language:English
Subjects:
Anharmonicity
anisotropic elasticity
Anisotropy
Astronomy
Astrophysics and Cosmology
Atomic
Charge transfer
Condensed Matter Physics
ferroelectrostriction
Fluorides
Intermetallic compounds
lattice thermal dynamics
magnetovolume effect
mechanisms of thermal contraction
Molecular
negative thermal expansion
negative thermal expansion materials
Optical and Plasma Physics
Particle and Nuclear Physics
Phase transitions
Phonons
Physics
Physics and Astronomy
Review Article
Special Topic: Thermodynamics and Thermal Metamaterials
Thermal expansion
Vibration
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Summary:Negative thermal expansion (NTE) of materials is an intriguing phenomenon challenging the concept of traditional lattice dynamics and of importance for a variety of applications. Progresses in this field develop markedly and update continuously our knowledge on the NTE behavior of materials. In this article, we review the most recent understandings on the underlying mechanisms (anharmonic phonon vibration, magnetovolume effect, ferroelectrorestriction and charge transfer) of thermal shrinkage and the development of NTE materials under each mechanism from both the theoretical and experimental aspects. Besides the low frequency optical phonons which are usually accepted as the origins of NTE in framework structures, NTE driven by acoustic phonons and the interplay between anisotropic elasticity and phonons are stressed. Based on the data documented, some problems affecting applications of NTE materials are discussed and strategies for discovering and design novel framework structured NET materials are also presented.
ISSN:2095-0462
2095-0470
DOI:10.1007/s11467-021-1070-0