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, K. S. Kim, H. S. Kim, T. H. Kim, H. W. Yeom, T. Y. Koo, H. D. Kim, J. H. Park

Research output: Contribution to journalArticlepeer-review

43 Scopus citations


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 (US)
Article number7342
JournalNature communications
StatePublished - Jun 10 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Biochemistry, Genetics and Molecular Biology
  • General Physics and Astronomy


Dive into the research topics of 'Charge-ordering cascade with spin-orbit Mott dimer states in metallic iridium ditelluride'. Together they form a unique fingerprint.

Cite this