Unusual superconducting behavior in HfV2Ga4

Author(s)

Santos, F. B. ^[1] ; Correa, L. E. ^[1] ; de Lima, B. S. ^[1] ; Cigarroa, O. V. ^[1] ; da Luz, M. S. ^[2] ; Grant, T. ^[1] ; Fisk, Z. ^[3] ; Machado, A. J. S. ^[1]

Affiliation

^[1] Univ Sao Paulo, Escola Engn Lorena, POB 116, BR-12602810 Lorena - Brazil

^[2] Univ Fed Trieingulo Mineiro, Rua Dr Randolfo Borges Jr 1250, BR-38066200 Uberaba - Brazil

^[3] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 - USA

• Document type: Journal article
• Source: Physics Letters A; v. 382, n. 15, p. 1065-1068, APR 19 2018.
• Web of Science Citations: 2

Abstract

Bulk superconductivity in HfV2Ga4 with critical temperature close to 4.1 K was determined via magnetic susceptibility, electrical resistivity and specific heat measurements. Both the upper and lower critical field dependence with reduced temperature (T/T-c) exhibit non-conventional behavior. The electronic component of specific heat shows a double-jump, the first close to T-c and the other close to 0.75T(c). We speculate about the nature of the douple jump observed in specific heat considering two plausable scenarios: bulk inhomogeneities and the existence of a second gap. (C) 2018 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 16/11774-5 - Study of superconductivity and magnetism in compounds which crystallize on the YbMo2Al4 and IrIn3 prototype structure
• Grantee: Antonio Jefferson da Silva Machado
• Support Opportunities: Regular Research Grants
• FAPESP's process: 13/16873-3 - Investigation of new superconductors of the Zr-Cu-Te and Zr-Ni-Te systems
• Grantee: Antonio Jefferson da Silva Machado
• Support Opportunities: Regular Research Grants
• FAPESP's process: 16/11565-7 - Investigation of the superconductivity and magnetism in compounds that crystallize on the YbMo2Al4 and IrIn3 prototype
• Grantee: Frederico Benedetto Santos
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)