Evidence of unconventional superconductivity in the Ni-doped NbB2 system (2019)
- Authors:
- USP affiliated authors: MACHADO, ANTONIO JEFFERSON DA SILVA - EEL ; CORRÊA, LUCAS EDUARDO - EEL
- Unidade: EEL
- DOI: 10.1016/j.jallcom.2019.02.072
- Assunto: SUPERCONDUTIVIDADE
- Keywords: Multiband superconductivity; Linear critical fields; Specific heat; NbB2 compound; Ni-doping
- Agências de fomento:
- Language: Inglês
- Abstract: In this paper, a comprehensive study of the effects of Ni-doping on structural, electrical, thermal and magnetic properties of the NbB2 is presented. Low amounts (≤10%) of Ni substitution on Nb sites cause structural distortions and induce drastic changes in the physical properties, such as the emergence of a bulk superconducting state with anomalous behaviors in the critical fields (lower and upper) and in the specific heat. Ni-doping at the 9 at.% level, for instance, is able to increase the critical temperature (Tc) in stoichiometric NbB2 (<1.3 K) to approximately 6.0 K. Bulk superconductivity is confirmed by magnetization, electronic transport, and specific heat measurements. Both Hc1 and Hc2 critical fields exhibit a linear dependence with reduced temperature (T/Tc), and the specific heat deviates remarkably from the conventional exponential temperature dependence of the single-band BCS theory. These findings suggest multiband superconductivity in the composition range from 0.01 ≤ x ≤ 0.10 (Nb1‒xNixB2).
- Imprenta:
- Source:
- Título: Journal of alloys and compounds
- ISSN: 09258388
- Volume/Número/Paginação/Ano: v.787, p.414-422, 2019
- Este periódico é de assinatura
- Este artigo é de acesso aberto
- URL de acesso aberto
- Cor do Acesso Aberto: green
-
ABNT
RENOSTO, Sergio Tuan et al. Evidence of unconventional superconductivity in the Ni-doped NbB2 system. Journal of alloys and compounds, v. 787, p. 414-422, 2019Tradução . . Disponível em: https://doi.org/10.1016/j.jallcom.2019.02.072. Acesso em: 03 out. 2024. -
APA
Renosto, S. T., Lang, R., Diez, E., Correa, L. E., Luz, M. S. da, Fisk, Z., & Machado, A. J. da S. (2019). Evidence of unconventional superconductivity in the Ni-doped NbB2 system. Journal of alloys and compounds, 787, 414-422. doi:10.1016/j.jallcom.2019.02.072 -
NLM
Renosto ST, Lang R, Diez E, Correa LE, Luz MS da, Fisk Z, Machado AJ da S. Evidence of unconventional superconductivity in the Ni-doped NbB2 system [Internet]. Journal of alloys and compounds. 2019 ;787 414-422.[citado 2024 out. 03 ] Available from: https://doi.org/10.1016/j.jallcom.2019.02.072 -
Vancouver
Renosto ST, Lang R, Diez E, Correa LE, Luz MS da, Fisk Z, Machado AJ da S. Evidence of unconventional superconductivity in the Ni-doped NbB2 system [Internet]. Journal of alloys and compounds. 2019 ;787 414-422.[citado 2024 out. 03 ] Available from: https://doi.org/10.1016/j.jallcom.2019.02.072 - Investigação de supercondutividade em boreto do sistema Ta-Zr-B
- Tuning of superconductivity by Ni substitution into noncentrosymmetric
- Study of the superconducting properties of the new intermetallic compound Zr1-xNbxB2
- Electronic band structure of the CDW material 'NI'x'ZR''TE'2 (x = 0.0 and 0.05) probed by ARPES
- Evidence for multiband superconductivity and charge density waves in Ni-doped ZrTe2
- Doping-induced superconductivity of ZrB 2 and HfB 2
- Evidence for topological behavior in superconducting Cu x ZrTe 2 − y
- Evidence of a Nodal Line in the Superconducting Gap Symmetry of Noncentrosymmetric
- Two-band superconductivity with unconventional pairing symmetry in HfV2Ga4
- Experimental Study of the Binary Nb-Te System
Informações sobre o DOI: 10.1016/j.jallcom.2019.02.072 (Fonte: oaDOI API)
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