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 language | English (US) |
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Article number | 041105 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 91 |
Issue number | 4 |
DOIs | |
State | Published - Jan 7 2015 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics