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Liang, Y. G.; Lee, S.; Yu, H. S.; Zhang, H. R.; Liang, Y. J.; Zavalij, P. Y.; Chen, X.; James, R. D.; Bendersky, L. A.; Davydov, A. V.; Zhang, X. H.; Takeuchi, I.
Nature communications, 07/2020, Letnik: 11, Številka: 1Journal Article
Abstract Structural phase transitions serve as the basis for many functional applications including shape memory alloys (SMAs), switches based on metal-insulator transitions (MITs), etc. In such materials, lattice incompatibility between transformed and parent phases often results in a thermal hysteresis, which is intimately tied to degradation of reversibility of the transformation. The non-linear theory of martensite suggests that the hysteresis of a martensitic phase transformation is solely determined by the lattice constants, and the conditions proposed for geometrical compatibility have been successfully applied to minimizing the hysteresis in SMAs. Here, we apply the non-linear theory to a correlated oxide system (V 1− x W x O 2 ), and show that the hysteresis of the MIT in the system can be directly tuned by adjusting the lattice constants of the phases. The results underscore the profound influence structural compatibility has on intrinsic electronic properties, and indicate that the theory provides a universal guidance for optimizing phase transforming materials.
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