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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.)

Isospin-phonon coupling and Fano-interference in spin-orbit Mott insulator Sr2IrO4

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Author(s):
Samanta, K. [1] ; Rigitano, D. [1] ; Pagliuso, P. G. [1] ; Granado, E. [1]
Total Authors: 4
Affiliation:
[1] Univ Campinas UNICAMP, Gleb Wataghin Inst Phys, BR-13083859 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Applied Physics Letters; v. 114, n. 15 APR 15 2019.
Web of Science Citations: 0
Abstract

The ``isospin-phonon{''} coupling in Sr2IrO4 is investigated by temperature dependent phonon Raman scattering. Anomalous behavior in the frequency of all studied optical phonons is observed below the magnetic transition temperature T-N similar to 240 K. The strongest effect is detected for the A(1g) mode at 272 cm(-1) associated with the modulation of the Ir-O-Ir bond angle. Additionally, the A(1g) mode at 560 cm(-1) shows a Fano asymmetric lineshape sensitive to T-N, supporting the existence of low energy (similar to 70 meV) electronic excitations that are renormalized by the magnetic order. These results reveal the characteristics of the interaction between the crystal lattice and electronic degrees of freedom in this ``spin-orbit{''} entangled Mott insulator. Published under license by AIP Publishing. (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: 16/00756-6 - Synthesis and Fundamental Investigation of Novel Correlated Electron Systems with Strong Spin-orbit Coupling
Grantee:Kousik Samanta
Support type: Scholarships in Brazil - Post-Doctorate