Origin of the exciton mass in the frustrated Mott insulator Na[subscript 2 ]IrO[subscript 3]
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PhysRevB.96.235141.pdf
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Author(s)
Cao, Gang
Alpichshev, Zhanybek
Sie, Edbert Jarvis
Mahmood, Fahad
Gedik, Nuh
Date Issued
December 2017
Journal
Physical Review B
Publisher
American Physical Society
Citation
Alpichshev, Zhanybek, et al. “Origin of the Exciton Mass in the Frustrated Mott Insulator Na[subscript 2]IrO[subscript 3].” Physical Review B, vol. 96, no. 23, Dec. 2017. © 2017 American Physical Society
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Final published version
Abstract
We use a three-pulse ultrafast optical spectroscopy to study the relaxation processes in a frustrated Mott insulator Na[subscript 2]IrO[subscript 3]. By being able to independently produce the out-of-equilibrium bound states (excitons) of doublons and holons with the first pulse and suppress the underlying antiferromagnetic order with the second one, we were able to elucidate the relaxation mechanism of quasiparticles in this system. By observing the difference in the exciton dynamics in the magnetically ordered and disordered phases we found that the mass of this quasiparticle is mostly determined by its interaction with the surrounding spins.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.96.235141
