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Emergent phenomena in Bi-based systems with low dimensionality

Grant number: 19/26247-9
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): July 01, 2020
Effective date (End): February 28, 2023
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal Investigator:Pascoal Jose Giglio Pagliuso
Grantee:Gabriel Silva Freitas
Home Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:17/10581-1 - Emergent phenomena in reduced dimension systems, AP.TEM

Abstract

In this work, we propose to investigate emergent phenomena such as unconventional superconductivity, complex magnetism and nontrivial topology in different bismuth (Bi) systems with low dimensionality (2D and 1D). To achieve this goal, we will develop a systematic of synthesis of several classes of these compounds, using the metallic flux growth technique for the synthesis of the single crystal with layered crystal structures (quasi-2D), as well as the metallic flux nanonucleation (MFNN)(Patent of our thematic group - national BR 10 2014 019794 0 and international WO2016023089) to obtain nanowires (1D) of these compounds. After the synthesis, we will study the structural, elementary, magnetic, electronic and thermodynamic properties to highlight the effects of low dimensional structures on the physical properties of these materials.Specifically, we will work with the RMBi2, RM2Bi families (R = Rare Earth, M = Transition Metal) and Sb1-xBix alloys investigating both a possible state of unconventional superconductivity and the emergence of nontrivial topological states and complex magnetism (magnetic frustration, multiple wave vector ordering, multipolar orders). These characteristics come from the competition between anisotropic magnetic interactions, Crystalline Electric Field (CEF) effects, Kondo effect, Spin-orbit interaction and electronic structure with nontrivial topology possibly present in these families and strongly affected by the low dimensionality of the systems. (AU)