Optical evidence for bonding-antibonding splitting in IrTe2

D. Mazumdar, K. Haule, J. J. Yang, G. L. Pascut, B. S. Holinsworth, K. R. O'Neal, V. Kiryukhin, Sang Wook Cheong, J. L. Musfeldt

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


We combined optical spectroscopy with first principles calculations to reveal the electronic signatures of Ir dimer formation in the q=(1/5,0,1/5) high resistivity phase of IrTe2. Our measurements uncover two interband transitions into the unoccupied dxy antibonding orbital, one from mixed iridium/tellurium bands, the other from the dxy bonding orbital of the dimerized Ir centers. The bonding-antibonding splitting demonstrates that iridium, not tellurium, plays the dominant role in stabilizing the low temperature phase of IrTe2 through localized bonding orbital formation.

Original languageEnglish (US)
Article number041105
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number4
StatePublished - Jan 7 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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