Pressure effects on the structural and superconducting transitions in La3Co4Sn13

Autor(es):Mostrar menos -

Mendonca-Ferreira, L. ^[1] ; Carneiro, F. B. ^[2] ; Fontes, M. B. ^[2] ; Baggio-Saitovitch, E. ^[2] ; Veiga, I, L. S. ; Mardegan, J. R. L. ^{[3, 4]} ; Strempfer, J. ^[3] ; Piva, M. M. ^[5] ; Pagliuso, P. G. ^[5] ; dos Reis, R. D. ^[6] ; Bittar, E. M. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210170 Santo Andre, SP - Brazil

^[2] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, RJ - Brazil

^[3] Veiga, L. S., I, DESY, Notkestr 85, D-22603 Hamburg - Germany

^[4] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Psi - Switzerland

^[5] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil

^[6] CNPEM, LNLS, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Alloys and Compounds; v. 773, p. 34-39, JAN 30 2019.
• Citações Web of Science: 2

Resumo

La3Co4Sn13 is a superconducting material with transition temperature at T-c = 2.70 K, which presents a superlattice structural transition at T{*} similar or equal to 150 K, a common feature for this class of compounds. However, for this material, it is not clear that at T' the lattice distortions arise from a charge density wave (CDW) or from a distinct microscopic origin. Interestingly, it has been suggested in isostructural non-magnetic intermetallic compounds that T{*} can be suppressed to zero temperature, by combining chemical and external pressure, and a quantum critical point is argued to be observed near these critical doping/pressure. Our study shows that application of pressure on single-crystalline La3Co4Sn13 enhances T-c and decreases T{*}. We observe thermal hysteresis loops for cooling/heating cycles around T{*} for P greater than or similar to 0.6 GPa, in electrical resistivity measurements, which are not seen in x-ray diffraction data. The hysteresis in electrical measurements may be due to the pinning of the CDW phase to impurities/defects, while the superlattice structural transition maintains its ambient pressure second-order transition nature under pressure. From our experiments we estimate that T{*} vanishes at around 5.5 GPa, though no quantum critical behavior is observed up to 2.53 GPa. (C) 2018 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 11/19924-2 - Estudo e desenvolvimento de novos materiais avançados: eletrônicos, magnéticos e nanoestruturados: uma abordagem interdisciplinar
• Beneficiário: Carlos Rettori
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 12/04870-7 - Estudos de novos materiais complexos e avançados
• Beneficiário: Pascoal Jose Giglio Pagliuso
• Modalidade de apoio: Auxílio à Pesquisa - Temático