Properties and superconductivity in Ti-doped NiTe2 single crystals

Autor(es)

de Lima, B. S. ^[1] ; de Cassia, R. R. ^[1] ; Santos, F. B. ^[1] ; Correa, L. E. ^[1] ; Grant, T. W. ^[1] ; Manesco, A. L. R. ^[1] ; Martins, G. W. ^[1] ; Eleno, L. T. F. ^[1] ; Torikachvili, M. S. ^[2] ; Machado, A. J. S. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Engn Lorena, BR-12600970 Lorena, SP - Brazil

^[2] San Diego State Univ, Dept Phys, San Diego, CA 92182 - USA

• Tipo de documento: Artigo Científico
• Fonte: Solid State Communications; v. 283, p. 27-31, NOV 2018.
• Citações Web of Science: 0

Resumo

Transition metal dichalcogenides (TMDs) usually show simple structures, however, with interesting properties. Recently some TMDs have been pointed out as type-II Dirac semimetals. In the present work, we investigate the physical properties of a new candidate for type-II Dirac semimetal and investigate the effect of titanium doping on physical properties of Ti-doped single crystalline samples of NiTe2. It was found that this compound shows superconducting properties with a critical temperature close to 4.0 K. Interestingly, applied pressures up to 1.3 GPa have no effect upon the superconducting state. Density Functional Theory (DFT) calculations demonstrate the presence of a Dirac cone in the band structure of NiTe2 literature when Spin-Orbit Coupling (SOC) is included, which is in agreement with a recent report for this compound. Also, our calculations demonstrate that Ti suppresses the formation of these non-trivial states. (AU)

• Processo FAPESP: 13/16873-3 - Investigação de novos supercondutores dos sistemas Zr-Cu-Te e Zr-Ni-Te
• Beneficiário: Antonio Jefferson da Silva Machado
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/10167-8 - Investigação de propriedades eletrônicas e topológicas de heterojunções supercondutor-grafeno para aplicações em dispositivos de computação quântica
• Beneficiário: Antonio Lucas Rigotti Manesco
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto