| Full text | |
| Author(s): Show less - |
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]
Total Authors: 11
|
| Affiliation: | [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
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | Journal of Alloys and Compounds; v. 773, p. 34-39, JAN 30 2019. |
| Web of Science Citations: | 2 |
| Abstract | |
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) | |
| FAPESP's process: | 11/19924-2 - Study and development of advanced novel materials: electronic, magnetic and nanostructured: an interdisciplinary approach |
| Grantee: | Carlos Rettori |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 12/04870-7 - Studies of novel complex and advanced materials |
| Grantee: | Pascoal Jose Giglio Pagliuso |
| Support Opportunities: | Research Projects - Thematic Grants |