Charge-ordering cascade with spin-orbit Mott dimer states in metallic iridium ditelluride

K. T. Ko, H. H. Lee, D. H. Kim, J. J. Yang, S. W. Cheong, M. J. Eom, J. S. Kim, R. Gammag, Keun Su Kim, H. S. Kim, T. H. Kim, H. W. Yeom, T. Y. Koo, H. D. Kim, J. H. Park

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Spin-orbit coupling results in technologically-crucial phenomena underlying magnetic devices like magnetic memories and energy-efficient motors. In heavy element materials, the strength of spin-orbit coupling becomes large to affect the overall electronic nature and induces novel states such as topological insulators and spin-orbit-integrated Mott states. Here we report an unprecedented charge-ordering cascade in IrTe 2 without the loss of metallicity, which involves localized spin-orbit Mott states with diamagnetic Ir 4+ -Ir 4+ dimers. The cascade in cooling, uncompensated in heating, consists of first order-type consecutive transitions from a pure Ir 3+ phase to Ir 3+ -Ir 4+ charge-ordered phases, which originate from Ir 5d to Te 5p charge transfer involving anionic polymeric bond breaking. Considering that the system exhibits superconductivity with suppression of the charge order by doping, analogously to cuprates, these results provide a new electronic paradigm of localized charge-ordered states interacting with itinerant electrons through large spin-orbit coupling.

Original languageEnglish
Article number7342
JournalNature communications
Volume6
DOIs
Publication statusPublished - 2015 Jun 10

Fingerprint

Iridium
Orbit
iridium
Dimers
cascades
Orbits
dimers
orbits
Magnetic Phenomena
Magnetic devices
magnetic storage
heavy elements
Superconductivity
electronics
Heating
cuprates
metallicity
Charge transfer
superconductivity
charge transfer

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Ko, K. T., Lee, H. H., Kim, D. H., Yang, J. J., Cheong, S. W., Eom, M. J., ... Park, J. H. (2015). Charge-ordering cascade with spin-orbit Mott dimer states in metallic iridium ditelluride. Nature communications, 6, [7342]. https://doi.org/10.1038/ncomms8342
Ko, K. T. ; Lee, H. H. ; Kim, D. H. ; Yang, J. J. ; Cheong, S. W. ; Eom, M. J. ; Kim, J. S. ; Gammag, R. ; Kim, Keun Su ; Kim, H. S. ; Kim, T. H. ; Yeom, H. W. ; Koo, T. Y. ; Kim, H. D. ; Park, J. H. / Charge-ordering cascade with spin-orbit Mott dimer states in metallic iridium ditelluride. In: Nature communications. 2015 ; Vol. 6.
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Ko, KT, Lee, HH, Kim, DH, Yang, JJ, Cheong, SW, Eom, MJ, Kim, JS, Gammag, R, Kim, KS, Kim, HS, Kim, TH, Yeom, HW, Koo, TY, Kim, HD & Park, JH 2015, 'Charge-ordering cascade with spin-orbit Mott dimer states in metallic iridium ditelluride', Nature communications, vol. 6, 7342. https://doi.org/10.1038/ncomms8342

Charge-ordering cascade with spin-orbit Mott dimer states in metallic iridium ditelluride. / Ko, K. T.; Lee, H. H.; Kim, D. H.; Yang, J. J.; Cheong, S. W.; Eom, M. J.; Kim, J. S.; Gammag, R.; Kim, Keun Su; Kim, H. S.; Kim, T. H.; Yeom, H. W.; Koo, T. Y.; Kim, H. D.; Park, J. H.

In: Nature communications, Vol. 6, 7342, 10.06.2015.

Research output: Contribution to journalArticle

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AU - Ko, K. T.

AU - Lee, H. H.

AU - Kim, D. H.

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AU - Cheong, S. W.

AU - Eom, M. J.

AU - Kim, J. S.

AU - Gammag, R.

AU - Kim, Keun Su

AU - Kim, H. S.

AU - Kim, T. H.

AU - Yeom, H. W.

AU - Koo, T. Y.

AU - Kim, H. D.

AU - Park, J. H.

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N2 - Spin-orbit coupling results in technologically-crucial phenomena underlying magnetic devices like magnetic memories and energy-efficient motors. In heavy element materials, the strength of spin-orbit coupling becomes large to affect the overall electronic nature and induces novel states such as topological insulators and spin-orbit-integrated Mott states. Here we report an unprecedented charge-ordering cascade in IrTe 2 without the loss of metallicity, which involves localized spin-orbit Mott states with diamagnetic Ir 4+ -Ir 4+ dimers. The cascade in cooling, uncompensated in heating, consists of first order-type consecutive transitions from a pure Ir 3+ phase to Ir 3+ -Ir 4+ charge-ordered phases, which originate from Ir 5d to Te 5p charge transfer involving anionic polymeric bond breaking. Considering that the system exhibits superconductivity with suppression of the charge order by doping, analogously to cuprates, these results provide a new electronic paradigm of localized charge-ordered states interacting with itinerant electrons through large spin-orbit coupling.

AB - Spin-orbit coupling results in technologically-crucial phenomena underlying magnetic devices like magnetic memories and energy-efficient motors. In heavy element materials, the strength of spin-orbit coupling becomes large to affect the overall electronic nature and induces novel states such as topological insulators and spin-orbit-integrated Mott states. Here we report an unprecedented charge-ordering cascade in IrTe 2 without the loss of metallicity, which involves localized spin-orbit Mott states with diamagnetic Ir 4+ -Ir 4+ dimers. The cascade in cooling, uncompensated in heating, consists of first order-type consecutive transitions from a pure Ir 3+ phase to Ir 3+ -Ir 4+ charge-ordered phases, which originate from Ir 5d to Te 5p charge transfer involving anionic polymeric bond breaking. Considering that the system exhibits superconductivity with suppression of the charge order by doping, analogously to cuprates, these results provide a new electronic paradigm of localized charge-ordered states interacting with itinerant electrons through large spin-orbit coupling.

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