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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Possible quantum fluctuations in the vicinity of the quantum critical point of (Sr, Ca)(3)Ir4Sn13 revealed by high-energy x-ray diffraction

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Veiga, I, L. S. ; Mardegan, J. R. L. [1] ; Zimmermann, V, M. ; Maimone, D. T. [2] ; Carneiro, F. B. [3, 4] ; Fontes, M. B. [3] ; Strempfer, J. [5] ; Granado, E. [2] ; Pagliuso, P. G. [2] ; Bittar, E. M. [3]
Total Authors: 10
[1] Veiga, L. S., I, DESY, D-22607 Hamburg - Germany
[2] Univ Estadual Campinas, UNICAMP, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[3] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, RJ - Brazil
[4] Univ Estado Rio De Janeiro, Inst Fis, BR-20550900 Rio De Janeiro, RJ - Brazil
[5] Zimmermann, M., V, Veiga, L. S., I, DESY, D-22607 Hamburg - Germany
Total Affiliations: 5
Document type: Journal article
Source: Physical Review B; v. 101, n. 10 MAR 19 2020.
Web of Science Citations: 0

We explore the evolution of the structural phase transition of (Sr, Ca)(3)Ir4Sn13, a model system to study the interplay between structural quantum criticality and superconductivity, by means of high-energy x-ray diffraction measurements at high pressures and low temperatures. Our results confirm a rapid suppression of the superlattice transition temperature T{*} against pressure, which extrapolates to zero at a critical pressure of approximate to 1.79(4) GPa. The temperature evolution of the superlattice Bragg peak in Ca3Ir4Sn13 reveals a drastic decrease of the intensity and an increase of the linewidth when T -> 0 K and p -> p(c). Such anomaly is likely associated with the emergence of quantum fluctuations that disrupt the formation of long-range superlattice modulation. The revisited temperature-pressure phase diagram of (Sr, Ca)(3)Ir4Sn13 thus highlights the intertwined nature of the distinct order parameters present in this system and demonstrates some similarities between this family and the unconventional superconductors. (AU)

FAPESP's process: 17/10581-1 - Emergent phenomena in reduced dimension systems
Grantee:Pascoal Jose Giglio Pagliuso
Support type: Research Projects - Thematic Grants
FAPESP's process: 12/04870-7 - Studies of novel complex and advanced materials
Grantee:Pascoal Jose Giglio Pagliuso
Support type: Research Projects - Thematic Grants