Evidence of multiband behavior in the superconducting alloy Zr0.96V0.04B2

Author(s)

Renosto, S. T. ; Consoline, H. ; dos Santos, C. A. M. ; Albino Aguiar, J. ; Jung, Soon-Gil ; Vanacken, J. ; Moshchalkov, V. V. ; Fisk, Z. ; Machado, A. J. S.

• Document type: Journal article
• Source: PHYSICAL REVIEW B; v. 87, n. 17, p. 6-pg., 2013-05-06.

Abstract

ZrB2 is a nonsuperconducting Pauli paramagnetic crystallizing in the AlB2 structure. V substitution for Zr in Zr1-xVxB2 (0.01 <= x <= 0.1) at the few percentage level induces superconductivity with critical temperature reaching a maximum of 8.7 K for Zr0.96V0.04B2 near the solid solubility limit. Specific-heat and lower critical field temperature dependence results suggest the possibility of unconventional superconductivity possibly arising from multiband effects. (AU)

• FAPESP's process: 09/54001-2 - Acquisition of cryogen-free equipment for the characterization of magnetic properties by vibrating sample magnetometry
• Grantee: Carlos Alberto Moreira dos Santos
• Support Opportunities: Multi-user Equipment Program
• FAPESP's process: 10/11770-3 - Study of deffect structure in transition metal diborides (MeB2)and its relationship with superconductor behavior.
• Grantee: Antonio Jefferson da Silva Machado
• Support Opportunities: Regular Research Grants
• FAPESP's process: 11/05961-3 - Study of superconductivity in diboride and dichalcogenates of transition metal (MeB2 and MeX2) with AlB2 prototype and its variations
• Grantee: Sérgio Tuan Renosto
• Support Opportunities: Scholarships in Brazil - Doctorate