Artigo de periodico

Two-band superconductivity with unconventional pairing symmetry in HfV2Ga4 (2020)

• Autores:
  • Bhattacharyya, Amitava
  • Ferreira, Pedro
  • Santos, F. B.
  • Adroja, Devashibhai
  • Lord, James
  • Correa, L. E
  • Machado, Antonio Jefferson da Silva
  • Manesco, Antonio L.R
  • Eleno, Luiz Tadeu Fernandes
• Autores USP: MACHADO, ANTONIO JEFFERSON DA SILVA - EEL ; ELENO, LUIZ TADEU FERNANDES - EEL ; FERREIRA, PEDRO PIRES - EEL ; CORRÊA, LUCAS EDUARDO - EEL ; MANESCO, ANTONIO LUCAS RIGOTTI - EEL
• Unidade: EEL
• DOI: 10.1103/PhysRevResearch.2.022001
• Assuntos: SUPERCONDUTIVIDADE; FÍSICA; MATÉRIA CONDENSADA; FÍSICA DA MATÉRIA CONDENSADA
• Agências de fomento:
  • Financiamento CNPq
  • Financiamento FAPESP
• Idioma: Inglês
• Resumo: In this Rapid Communication, we have examined the superconducting ground state of the HfV 2 Ga 4 compound using resistivity, magnetization, zero-field (ZF), and transverse-field (TF) muon-spin relaxation and rotation ( μ SR ) measurements. Resistivity and magnetization unveil the onset of bulk superconductivity with T C ∼ 3.9 K. TF- μ SR measurements show the temperature dependence of the superfluid density, indicating, surprisingly, a nodal two-gap ( s + d ) -wave superconducting order parameter. In addition, the ZF muon relaxation rate increases with decreasing temperature below 4.6 K, suggesting the presence of weak spin fluctuations. These observations pointed to an unconventional multiband nature of the superconducting ground state. To better understand these findings, we carry out first-principles electronic-structure calculations, further highlighting multiple disconnected sheets with very different orbital weights and spin-orbit coupling composing the Fermi surface, bridging the way for a nodal multiband superconductivity scenario. In this vein, therefore, the HfV 2 Ga 4 family stands out as an open avenue to novel unexplored unconventional superconducting compounds and an ideal playground to investigate the mechanisms behind such phenomena.
• Fonte:
  • Título: Physical Review Research
  • ISSN: 26431564
  • Volume/Número/Paginação/Ano: v2., p.022001-, 2020

Informações sobre o DOI: 10.1103/PhysRevResearch.2.022001 (Fonte: oaDOI API)
• Este periódico é de acesso aberto
• Este artigo é de acesso aberto
• URL de acesso aberto
• Cor do Acesso Aberto: gold
• Licença: cc-by

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• ABNT

  BHATTACHARYYA, Amitava et al. Two-band superconductivity with unconventional pairing symmetry in HfV2Ga4. Physical Review Research, p. 022001-, 2020Tradução . . Disponível em: https://doi.org/10.1103/PhysRevResearch.2.022001. Acesso em: 05 nov. 2024.

• APA

  Bhattacharyya, A., Ferreira, P., Santos, F. B., Adroja, D., Lord, J., Correa, L. E., et al. (2020). Two-band superconductivity with unconventional pairing symmetry in HfV2Ga4. Physical Review Research, 022001-. doi:10.1103/PhysRevResearch.2.022001

• NLM

  Bhattacharyya A, Ferreira P, Santos FB, Adroja D, Lord J, Correa LE, Machado AJ da S, Manesco ALR, Eleno LTF. Two-band superconductivity with unconventional pairing symmetry in HfV2Ga4 [Internet]. Physical Review Research. 2020 ; 022001-.[citado 2024 nov. 05 ] Available from: https://doi.org/10.1103/PhysRevResearch.2.022001

• Vancouver

  Bhattacharyya A, Ferreira P, Santos FB, Adroja D, Lord J, Correa LE, Machado AJ da S, Manesco ALR, Eleno LTF. Two-band superconductivity with unconventional pairing symmetry in HfV2Ga4 [Internet]. Physical Review Research. 2020 ; 022001-.[citado 2024 nov. 05 ] Available from: https://doi.org/10.1103/PhysRevResearch.2.022001

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