Study of superconductivity and magnetism in compounds which crystallize on the YbMo2Al4 and IrIn3 prototype structure

• Grant number: 16/11774-5
• Support Opportunities: Regular Research Grants
• Start date: September 01, 2016
• End date: February 28, 2019
• Field of knowledge: Engineering - Materials and Metallurgical Engineering
• Principal Investigator: Antonio Jefferson da Silva Machado
• Grantee: Antonio Jefferson da Silva Machado
• Host Institution: Escola de Engenharia de Lorena (EEL). Universidade de São Paulo (USP). Lorena , SP, Brazil

Abstract

This work plan is about the research of promising new materials for superconductivity that crystallize in YbMo2Al4 prototype. Preliminary results presented in this plan, show unambiguously that two members of this family with HfV2Ga4 and ScV2Ga4 compositions are new superconductors with critical temperatures of 4.0 K and 3.0 K respectively. These materials exhibit strong signature multiband behavior revealed by the phase diagram Hc2 vs T. These results suggest that there is a huge family of materials that have unusual characteristics of superconductivity in the sense point not yet explored in the literature. Furthermore, these results suggest that there may be new compounds having coexistence of magnetism and superconductivity. Other material of much interest in this work plan is the FeGa3 compound crystallizes in IrIn3 prototype. This is a semiconductor compound of great interest in the literature. In this regard, preliminary results will be shown in this plan confirming that a small replacement of iron by molybdenum generates a superconductor with critical temperature of 9.5 K. In this context, this proposal presented is totally unique and offers a great opportunity to explore new materials with unusual properties. (AU)

Scientific publications

(7)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

FERREIRA, P. P.; SANTOS, F. B.; MACHADO, A. J. S.; PETRILLI, H. M.; ELENO, L. T. F.. Insights into the unconventional superconductivity in HfV2Ga4 and ScV2Ga4 from first-principles electronic-structure calculations. Physical Review B, v. 98, n. 4, JUL 18 2018. (17/11023-2, 16/11774-5, 16/11565-7)

CORREA, L. E.; NOVA, J. C. C.; DE FARIA, L. R.; SANTOS, F. B.; DE LIMA, B. S.; NUNES, C. A.; COELHO, G. C.; ROGL, P.; FISK, Z.; MACHADO, A. J. S.. Evidence of multiband behavior in a new superconductor Ta0.8Zr0.2B with FeB-prototype structure. Journal of Alloys and Compounds, v. 803, p. 597-600, SEP 30 2019. (16/11774-5, 16/11565-7, 18/08819-2)

SANTOS, F. B.; CORREA, L. E.; DE LIMA, B. S.; CIGARROA, O. V.; DA LUZ, M. S.; GRANT, T.; FISK, Z.; MACHADO, A. J. S.. Unusual superconducting behavior in HfV2Ga4. Physics Letters A, v. 382, n. 15, p. 1065-1068, APR 19 2018. (16/11774-5, 13/16873-3, 16/11565-7)

DE FARIA, L. R.; FERREIRA, P. P.; CORREA, L. E.; ELENO, L. T. F.; TORIKACHVILI, M. S.; MACHADO, A. J. S.. Possible multiband superconductivity in the quaternary carbide YRe2SiC. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, v. 34, n. 6, JUN 2021. (16/11774-5, 19/05005-7, 19/14359-7, 19/17878-5, 20/08258-0)

FERREIRA, P. P.; SANTOS, F. B.; MACHADO, A. J. S.; PETRILLI, H. M.; ELENO, L. T. F.. Insights into the unconventional superconductivity in HfV2Ga4 and ScV2Ga4 from first-principles electronic-structure calculations. PHYSICAL REVIEW B, v. 98, n. 4, p. 7-pg., 2018-07-18. (17/11023-2, 16/11565-7, 16/11774-5)

BHATTACHARYYA, A.; FERREIRA, R. P.; SANTOS, F. B.; ADROJA, D. T.; LORD, J. S.; CORREA, L. E.; MACHADO, A. J. S.; MANESCO, A. L. R.; ELENO, L. T. F.. Two-band superconductivity with unconventional pairing symmetry in HfV2Ga4. PHYSICAL REVIEW RESEARCH, v. 2, n. 2, APR 1 2020. (16/11565-7, 19/05005-7, 16/11774-5, 18/08819-2, 18/10835-6, 19/07082-9, 18/20546-1, 16/10167-8)

DE LIMA, B. S.; CHAIA, N.; GRANT, T. W.; DE FARIA, L. R.; CANOVA, J. C.; DE OLIVEIRA, F. S.; ABUD, F.; MACHADO, A. J. S.. Large enhancement of the CDW resistivity anomaly and traces of superconductivity in imperfect samples of NbTe4. Materials Chemistry and Physics, v. 226, p. 95-99, MAR 15 2019. (16/11774-5, 13/16873-3)