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

10 Scopus citations

Abstract

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
Volume91
Issue number4
DOIs
StatePublished - Jan 7 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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