Artigo de periodico

Evidence for multiband superconductivity and charge density waves in Ni-doped ZrTe2 (2022)

• Authors:
  • Correa, Lucas Eduardo
  • Ferreira, Pedro Pires
  • Faria, Leandro Rodrigues de
  • Dorini, T. T
  • Luz, Mário Sérgio da
  • Fisk, Zachary
  • Torikachvili, Milton S
  • Eleno, Luiz Tadeu Fernandes
  • Machado, Antonio Jefferson da Silva
• USP affiliated authors: MACHADO, ANTONIO JEFFERSON DA SILVA - EEL ; ELENO, LUIZ TADEU FERNANDES - EEL ; CORRÊA, LUCAS EDUARDO - EEL ; FERREIRA, PEDRO PIRES - EEL
• Unidade: EEL
• DOI: 10.1016/j.jallcom.2022.164477
• Assunto: SUPERCONDUTIVIDADE
• Keywords: Density functional theory (DFT); Multiband superconductivity; Charge density waves (CDW); Topological semimetals; Transition metal dichalcogenides; Quantum materials
• Agências de fomento:
  • Financiamento FAPESP
  • Financiamento CAPES
• Language: Inglês
• Abstract: We carried out a comprehensive study of the electronic, magnetic, and thermodynamic properties of Ni-doped ZrTe2. High quality Ni0.04ZrTe1.89 single crystals show a possible coexistence of charge density waves (CDW, TCDW ≈ 287 K) with superconductivity (Tc ≈ 4.1 K), which we report here for the first time. The temperature dependence of the lower (H ) and upper (H ) critical magnetic fields both deviate significantly from the behaviors expected in conventional single-gap s-wave superconductors. However, the behaviors of the normalized superfluid density ρs(T) and H can be described well using a two-gap model for the Fermi surface, in a manner consistent with conventional multiband superconductivity. Electrical resistivity and specific heat measurements show clear anomalies centered near 287 K consistent with a CDW phase transition. Additionally, electronic-structure calculations support the coexistence of electron-phonon multiband superconductivity and CDW order due to the compensated disconnected nature of the electron- and hole-pockets at the Fermi surface. Our electronic structure calculations also suggest that ZrTe2 could reach a non-trivial topological type-II Dirac semimetallic state. These findings highlight that Ni-doped ZrTe2 can be uniquely important for probing the coexistence of superconducting and CDW ground states in an electronic system with non-trivial topology.
• Imprenta:
  • Publisher: Elsevier
  • Date published: 2022
• Source:
  • Título: Journal of alloys and compounds
  • ISSN: 09258388
  • Volume/Número/Paginação/Ano: v.907, p.164477-, 2022

Informações sobre o DOI: 10.1016/j.jallcom.2022.164477 (Fonte: oaDOI API)
• Este periódico é de assinatura
• Este artigo é de acesso aberto
• URL de acesso aberto
• Cor do Acesso Aberto: green

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How to cite

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• ABNT

  CORREA, Lucas Eduardo et al. Evidence for multiband superconductivity and charge density waves in Ni-doped ZrTe2. Journal of alloys and compounds, v. 907, p. 164477-, 2022Tradução . . Disponível em: https://doi.org/10.1016/j.jallcom.2022.164477. Acesso em: 28 dez. 2025.

• APA

  Correa, L. E., Ferreira, P. P., Faria, L. R. de, Dorini, T. T., Luz, M. S. da, Fisk, Z., et al. (2022). Evidence for multiband superconductivity and charge density waves in Ni-doped ZrTe2. Journal of alloys and compounds, 907, 164477-. doi:10.1016/j.jallcom.2022.164477

• NLM

  Correa LE, Ferreira PP, Faria LR de, Dorini TT, Luz MS da, Fisk Z, Torikachvili MS, Eleno LTF, Machado AJ da S. Evidence for multiband superconductivity and charge density waves in Ni-doped ZrTe2 [Internet]. Journal of alloys and compounds. 2022 ;907 164477-.[citado 2025 dez. 28 ] Available from: https://doi.org/10.1016/j.jallcom.2022.164477

• Vancouver

  Correa LE, Ferreira PP, Faria LR de, Dorini TT, Luz MS da, Fisk Z, Torikachvili MS, Eleno LTF, Machado AJ da S. Evidence for multiband superconductivity and charge density waves in Ni-doped ZrTe2 [Internet]. Journal of alloys and compounds. 2022 ;907 164477-.[citado 2025 dez. 28 ] Available from: https://doi.org/10.1016/j.jallcom.2022.164477

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