Artigo de periodico

Two-band superconductivity with unconventional pairing symmetry in HfV2⁢Ga4 (2020)

• Authors:
  • Bhattacharyya, Amitava
  • Ferreira, Pedro Nunes
  • Santos, F. B.
  • Adroja, Devashibhai
  • Lord, James
  • Correa, Lucas Eduardo
  • Machado, Antonio Jefferson da Silva
  • Manesco, Antonio L R
  • Eleno, Luiz Tadeu Fernandes
• USP affiliated authors: MACHADO, ANTONIO JEFFERSON DA SILVA - EEL ; ELENO, LUIZ TADEU FERNANDES - EEL ; MANESCO, ANTONIO LUCAS RIGOTTI - EEL ; FERREIRA, PEDRO NUNES - EEL ; CORRÊA, LUCAS EDUARDO - EEL
• Unidade: EEL
• DOI: 10.1103/physrevresearch.2.022001
• Subjects: FÍSICA; SUPERCONDUTIVIDADE; MAGMATISMO
• Agências de fomento:
  • Financiamento FAPESP
  • Financiamento CNPq
• Language: Inglês
• Abstract: In this Rapid Communication, we have examined the superconducting ground state of the HfV2⁢Ga4 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 𝑇C∼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 HfV2⁢Ga4 family stands out as an open avenue to novel unexplored unconventional superconducting compounds and an ideal playground to investigate the mechanisms behind such phenomena.
• Imprenta:
  • Publisher: APS
  • Date published: 2020
• Source:
  • Título: Physical Review Research
  • ISSN: 2643-1564
  • Volume/Número/Paginação/Ano: v. 2, p.1-6, 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
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• Licença: cc-by

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How to cite

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• ABNT

  BHATTACHARYYA, Amitava et al. Two-band superconductivity with unconventional pairing symmetry in HfV2⁢Ga4. Physical Review Research, v. 2, p. 1-6, 2020Tradução . . Disponível em: https://doi.org/10.1103/physrevresearch.2.022001. Acesso em: 28 dez. 2025.

• APA

  Bhattacharyya, A., Ferreira, P. N., Santos, F. B., Adroja, D., Lord, J., Correa, L. E., et al. (2020). Two-band superconductivity with unconventional pairing symmetry in HfV2⁢Ga4. Physical Review Research, 2, 1-6. doi:10.1103/physrevresearch.2.022001

• NLM

  Bhattacharyya A, Ferreira PN, Santos FB, Adroja D, Lord J, Correa LE, Machado AJ da S, Manesco ALR, Eleno LTF. Two-band superconductivity with unconventional pairing symmetry in HfV2⁢Ga4 [Internet]. Physical Review Research. 2020 ; 2 1-6.[citado 2025 dez. 28 ] Available from: https://doi.org/10.1103/physrevresearch.2.022001

• Vancouver

  Bhattacharyya A, Ferreira PN, Santos FB, Adroja D, Lord J, Correa LE, Machado AJ da S, Manesco ALR, Eleno LTF. Two-band superconductivity with unconventional pairing symmetry in HfV2⁢Ga4 [Internet]. Physical Review Research. 2020 ; 2 1-6.[citado 2025 dez. 28 ] Available from: https://doi.org/10.1103/physrevresearch.2.022001

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