| Full text | |
| 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 |