Tracking local magnetic dynamics via high-energy charge excitations in a relativistic Mott insulator

Francesco Banfi, Gabriele Ferrini, Claudio Giannetti, Nicola Nembrini, Simone Peli, Yogesh Singh, P. Gegenwart, R. Comin, K. Foyevtsova, A. Damascelli, A. Avella

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

11 Citazioni (Scopus)

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 originaleEnglish
pagine (da-a)N/A-N/A/A
RivistaPHYSICAL REVIEW. B
Volume94
DOI
Stato di pubblicazionePubblicato - 2016

Keywords

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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