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Origin of the exciton mass in the frustrated Mott insulator Na[subscript 2 ]IrO[subscript 3]

Author(s)
Cao, Gang; Alpichshev, Zhanybek; Sie, Edbert Jarvis; Mahmood, Fahad; Gedik, Nuh
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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.
Date issued
2017-12
URI
http://hdl.handle.net/1721.1/114259
Department
Massachusetts Institute of Technology. Department of Physics
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
Version: Final published version
ISSN
2469-9950
2469-9969

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