Artigo de periodico

Elastic anisotropy and thermal properties of extended linear chain compounds MV2Ga4 (M = Sc, Zr, Hf) from ab-initio calculations (2018)

• Authors:
  • Ferreira, Pedro P.
  • Dorini, Thiago Trevizam
  • Santos, Frederico Benedetto
  • Machado, Antonio Jefferson da Silva
  • Eleno, Luiz Tadeu Fernandes
• USP affiliated authors: MACHADO, ANTONIO JEFFERSON DA SILVA - EEL ; ELENO, LUIZ TADEU FERNANDES - EEL ; DORINI, THIAGO TREVIZAM - EEL ; SANTOS, FREDERICO BENEDETTO - EEL
• Unidade: EEL
• DOI: 10.1016/j.mtla.2018.11.008
• Assunto: SUPERCONDUTIVIDADE
• Keywords: Anisotropic elasticity; Ab-initio calculations; Mechanical behavior; Superconductivity; Extended linear chain compounds; Comportamento Mecânico
• Agências de fomento:
  • Financiamento FAPESP
  • Financiamento CAPES
  • Financiamento CNPq
• Language: Inglês
• Abstract: MV2Ga4 (M = Sc, Zr, Hf) compounds belong to an emerging class of materials showing a unique combination of unusual superconducting behavior with extended linear chains in the crystal structure. In order to gain insights into its mechanical and thermal properties, we have performed first-principles electronic-structure calculations in the framework of the Density Functional Theory (DFT). From the calculated second-order elastic constants, we have systematically shown that the extended linear vanadium chain substructures indeed give rise to an anisotropic regime in the elastic and mechanical moduli. The high density of valence and conduction electrons along the linear vanadium chains leads to a directional dependence of the reciprocal linear compressibility, Young’s modulus and shear modulus. Poisson’s ratio for several elongation directions is also drastically affected by the presence of extended V chains. If the elongation is along the V chains, all compounds exhibit practically the same Poisson ratio in directions perpendicular to it, further highlighting the importance of the V chains to the mechanical properties. Moreover, based on our results, we have discussed the possible consequences of the elastic anisotropy on the superconducting properties of the compounds. Finally, using the Debye–Grüneisen approximation, our calculations of thermal properties show a good agreement with the available experimental low temperature heat capacity data above the superconducting critical temperature.
• Imprenta:
  • Publisher: Elsevier
  • Publisher place: Houston
  • Date published: 2018
• Source:
  • Título: Materialia
  • ISSN: 2589-1529
  • Volume/Número/Paginação/Ano: v. 4, p.529-539, 2018


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• ABNT

  FERREIRA, Pedro P. et al. Elastic anisotropy and thermal properties of extended linear chain compounds MV2Ga4 (M = Sc, Zr, Hf) from ab-initio calculations. Materialia, v. 4, p. 529-539, 2018Tradução . . Disponível em: https://doi.org/10.1016/j.mtla.2018.11.008. Acesso em: 02 abr. 2026.

• APA

  Ferreira, P. P., Dorini, T. T., Santos, F. B., Machado, A. J. da S., & Eleno, L. T. F. (2018). Elastic anisotropy and thermal properties of extended linear chain compounds MV2Ga4 (M = Sc, Zr, Hf) from ab-initio calculations. Materialia, 4, 529-539. doi:10.1016/j.mtla.2018.11.008

• NLM

  Ferreira PP, Dorini TT, Santos FB, Machado AJ da S, Eleno LTF. Elastic anisotropy and thermal properties of extended linear chain compounds MV2Ga4 (M = Sc, Zr, Hf) from ab-initio calculations [Internet]. Materialia. 2018 ; 4 529-539.[citado 2026 abr. 02 ] Available from: https://doi.org/10.1016/j.mtla.2018.11.008

• Vancouver

  Ferreira PP, Dorini TT, Santos FB, Machado AJ da S, Eleno LTF. Elastic anisotropy and thermal properties of extended linear chain compounds MV2Ga4 (M = Sc, Zr, Hf) from ab-initio calculations [Internet]. Materialia. 2018 ; 4 529-539.[citado 2026 abr. 02 ] Available from: https://doi.org/10.1016/j.mtla.2018.11.008

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