Antonio Jefferson da Silva Machado

• Abstract

  Preliminary results shown in this proposal with intercalation of rare earths in hosts material such as ZrTe2 and ZrTe3 reveal exotic behaviors that may indicate new ground states for these low-dimensional materials. Intercalation of transition metals such as Ni into ZrTe2 shows the coexistence between superconductivity and so call Charge density Wave CDW instability. When rare earths are …

  Investigation about the coexistence between magnetism, CDW instability and superconductivity in chalcogenides of transition metals, AP.R

• Abstract

  This project deals with the request for assistance from FAPESP, Visiting Researcher modality, in order to fund the visit of Professor. Milton S. Torikachvili on a four (4) month scientific mission from December 1, 2019. The mission will be accomplished with the groups of Profs. Antonio J. S. Machado, belonging to EEL-USP and three other (03) researchers from the Institute of Physics - USP…

  Topological superconductivity in intermetallics (Ni,Zr)Te2 type, AV.EXT

• Abstract

  This research project is about the growth of high-quality single crystals by the self-flow method and by the vapor method of dichalcogenides that crystallize in the CdI2 prototype. Preliminary results shown in this plan suggest that it is possible to grow high-quality crystals by these methods represented by a member of the family which is Ni0.02ZrTe2. Boundary structure calculations, as …

  Growth single crystals and investigation of superconducting topological properties in metal transition dichalcogenides, AP.R

(Only some records are available in English at this moment)

• Abstract

  Recently, our research group demonstrated that tellurium deficiency in the Dirac semimetal of ZrTe2 composition induces superconductivity around 3.3 K. Thus, this work plan deals with the study of the superconductivity that emerges from the replacement of Te by Se in host material on ZrTe2-xSex stoichiometry. The preliminary results presented in this work plan show that the first substitu…

  Effect of replacement of tellurium by selenium on the superconducting behavior of the stoichiometric ZrTe2 Dirac semimetal., BP.IC

• Abstract

  This proposal is about superconductivity study that emerge from Ru intercalation in a dichalcogenide of ZrTe2 composition. The preliminary results presented in this proposal shows that intercalation between tellurium atoms in this compound, which is today considered a Dirac semimetal with non-trivial topology, have ability in induce superconductivity on the host material. The preliminary …

  Investigation of superconductivity which emerge from Ru intercalation in a Dirac semimetal of ZrTe2 composition, BP.IC

• Abstract

  This proposal is about the high quality crystals growth by the new growth method developed in our research group at EEL-USP, of dichalcogenides that crystallize in the CdI2 prototype strcuture. Preliminary results shown in this proposal reveal that it is possible to grow high quality crystals by this new method, represented by the intercalation of rare earths described by the family repre…

  Study of topological properties in new superconductors dichalcogenides which crystalizes in CdI2 prototype structure intercalated with rare earth., BP.DR

(Only some records are available in English at this moment)

• Abstract

  The scientific initiation student Larissa Miki Ishikura has been successfully synthesizing and growing high quality single crystals of RExZrTe2, where RE = Rare Earth, in which the dopant is intercalated between the Te atoms on the ZrTe2 structure. The findings in RExZrTe2 strongly suggest that the unit cell contraction has an impact on the superconducting critical temperature systematica…

  Pressure effect on superconducting dichalcogenides ZrTe2 intercalated with ruthenium, BE.EP.IC

• Abstract

  During the regular doctoral project in Brazil, several interesting results were found from the point of view of superconductivity for compounds that crystallize in the prototype structures YbMo2Al4 and IrIn3. For the first case, the compound HfV2Ga4 presents superconductivity with a critical temperature equal to 4.1K and several signatures of multiband behaviors, mainly in the upper and l…

  Single crystal growth of (Hf, Sc, RE)V2Ga4 (RE = rare earth) and (Fe, Co, Ru)1-xRMxGa3 (RM = refractory metals) compounds and the study of their Fermi surface, electronic structure, and superconducting properties under extreme conditions, BE.EP.DD

• Abstract

  This work plan being developed at the University of California at Irvine (UCI), under the supervision of Prof. Dr. Zachary Fisk, deals with the possibility of exploring new superconductors through ThB12 phase stabilization by substitution of Th ions by other ions smaller and compatible with Th. This possibility is evident from the analysis of the new superconductor of stoichiometry Th0.97…

  Study of stabilization of the Th1-xMxB12 phase with UB12 prototype and experimental investigation of physical properties, BE.EP.DR