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EnglishWe use time- and energy-resolved optical spectroscopy to investigate the coupling of electron-hole excitations to the magnetic environment in the relativistic Mott insulator Na2IrO3. We show that, on the picosecond time scale, the photoinjected electron-hole pairs delocalize on the hexagons of the Ir lattice via the formation of quasimolecular orbital excitations and the exchange of energy with the short-range-ordered zigzag magnetic background. The possibility of mapping the magnetic dynamics, which is characterized by typical frequencies in the THz range, onto high-energy (1-2 eV) charge excitations provides a platform to investigate, and possibly control, the dynamics of magnetic interactions in correlated materials with strong spin-orbit coupling, even in the presence of complex magnetic phases.
Nembrini, N., Peli, S., Banfi, F., Ferrini, G., Singh, Y., Gegenwart, P., Comin, R., Foyevtsova, K., Damascelli, A., Avella, A., Giannetti, C., Tracking local magnetic dynamics via high-energy charge excitations in a relativistic Mott insulator, <<PHYSICAL REVIEW. B>>, 2016; 94 (20): N/A-N/A/A. [doi:10.1103/PhysRevB.94.201119] [http://hdl.handle.net/10807/98313]
| Autori: | ||
| Titolo: | Tracking local magnetic dynamics via high-energy charge excitations in a relativistic Mott insulator | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevB.94.201119 | |
| URL: | https://journals.aps.org/prb/abstract/10.1103/PhysRevB.94.201119 Tracking local magnetic dynamics via high-energy charge excitations in a relativistic Mott insulator | |
| Data di pubblicazione: | 2016 | |
| Abstract: | We use time- and energy-resolved optical spectroscopy to investigate the coupling of electron-hole excitations to the magnetic environment in the relativistic Mott insulator Na2IrO3. We show that, on the picosecond time scale, the photoinjected electron-hole pairs delocalize on the hexagons of the Ir lattice via the formation of quasimolecular orbital excitations and the exchange of energy with the short-range-ordered zigzag magnetic background. The possibility of mapping the magnetic dynamics, which is characterized by typical frequencies in the THz range, onto high-energy (1-2 eV) charge excitations provides a platform to investigate, and possibly control, the dynamics of magnetic interactions in correlated materials with strong spin-orbit coupling, even in the presence of complex magnetic phases. | |
| Lingua: | Inglese | |
| Rivista: | ||
| Citazione: | Nembrini, N., Peli, S., Banfi, F., Ferrini, G., Singh, Y., Gegenwart, P., Comin, R., Foyevtsova, K., Damascelli, A., Avella, A., Giannetti, C., Tracking local magnetic dynamics via high-energy charge excitations in a relativistic Mott insulator, <<PHYSICAL REVIEW. B>>, 2016; 94 (20): N/A-N/A/A. [doi:10.1103/PhysRevB.94.201119] [http://hdl.handle.net/10807/98313] | |
| Appare nelle tipologie: | Articolo in rivista, Nota a sentenza |
File in questo prodotto:
| File | Descrizione | Tipologia | Note | Licenza | |
|---|---|---|---|---|---|
| 1606.01667.pdf | arXiv version of the manuscript | Postprint (versione finale dell’autore successiva alla peer-review) | Nessuna Nota |  | Open Access Visualizza/Apri |
http://hdl.handle.net/10807/98313
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