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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.)

Crystalline electric field study in a putative topologically trivial rare-earth doped YPdBi compound

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Author(s):
Souza, J. C. [1] ; Jesus, C. B. R. [1, 2] ; Lesseux, G. G. [1, 3] ; Rosa, P. F. S. [4, 1] ; Urbano, R. R. [1] ; Pagliuso, P. G. [1]
Total Authors: 6
Affiliation:
[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[2] Univ Fed Sergipe, Dept Fis, BR-49500000 Sao Cristovao, SE - Brazil
[3] Univ Stuttgart, Phys Inst 1, D-70569 Stuttgart - Germany
[4] Los Alamos Natl Lab, Los Alamos, NM 87545 - USA
Total Affiliations: 4
Document type: Journal article
Source: JOURNAL OF PHYSICS-CONDENSED MATTER; v. 31, n. 46 NOV 20 2019.
Web of Science Citations: 0
Abstract

Topological states of matter have attracted a lot of attention recently due to their intriguing physical properties and potential applications. In particular, the family of half-Heusler compounds RMT (R = rare earth, M = Pt, Pd or Au, and T. Bi, Sb, Pb or Sn) has been predicted to display tunable topological properties via their cubic unit cell volume and/or the charges of the M and T atoms. In this work, we report electron spin resonance (ESR), along with complementary macroscopic experiments, in the putative topologically trivial rare-earth doped (Gd, Nd and Er) YPdBi. From magnetic susceptibility data analysis constrained by ESR results, we were able to extract the fourth (A(4)) and sixth (A(6)) order crystal field parameters (CFP) for YPdBi and compared them with those already reported to YPtBi, which is known as a topologically non-trivial compound. We observed that the sign of the CFP changes systematically from YPdBi to YPtBi, possibly due to the inversion of the valence and conduction bands at the Fermi level. The enhanced spin-orbit coupling in YPtBi, when compared to YPdBi, induces the band inversion that drives the system to a non-trivial topological state. This band inversion likely has an effect on the effective charges surrounding the magnetic dopants that are probed by the CFP. (AU)

FAPESP's process: 11/23650-5 - Investigation of band structure and Fermi surface in advanced complex materials studied by angle-resolved photoemission spectroscopy
Grantee:Cris Adriano
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 10/11949-3 - Electron spin resonance (ESR) in superconducting Fe-based pnictides
Grantee:Priscila Ferrari Silveira Rosa
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 09/09247-3 - Investigation of pressure induced ordered states in novel complex materials.
Grantee:Cris Adriano
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 12/05903-6 - Nuclear magnetic resonance of novel complex and advanced materials in condensed matter physics
Grantee:Ricardo Rodrigues Urbano
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 11/01564-0 - Materials sciences on complex and advanced systems
Grantee:Pascoal Jose Giglio Pagliuso
Support type: Scholarships abroad - Research
FAPESP's process: 12/04870-7 - Studies of novel complex and advanced materials
Grantee:Pascoal Jose Giglio Pagliuso
Support type: Research Projects - Thematic Grants
FAPESP's process: 18/11364-7 - Magnetic properties of complex systems with non-trivial topology
Grantee:Jean Carlo Souza
Support type: Scholarships in Brazil - Doctorate
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: 06/60440-0 - Study of strongly correlated systems in extreme conditions
Grantee:Carlos Rettori
Support type: Research Projects - Thematic Grants