Anionic depolymerization transition in IrTe2

Yoon Seok Oh, J. J. Yang, Y. Horibe, S. W. Cheong

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85 Scopus citations


Selenium substitution drastically increases the transition temperature of iridium ditelluride (IrTe2) to a diamagnetic superstructure from 278 to 560 K. Transmission electron microscopy experiments revealed that this enhancement is accompanied by the evolution of nonsinusoidal structure modulations from q=1/5(101̄) to q=1/6(101̄) types. These comprehensive results are consistent with the concept of the destabilization of polymeric Te-Te bonds at the transition, the temperature of which is increased by chemical and hydrostatic pressure and by the substitution of Te with the more electronegative Se. This temperature-induced depolymerization transition in IrTe2 is unique in crystalline inorganic solids.

Original languageEnglish (US)
Article number127209
JournalPhysical Review Letters
Issue number12
StatePublished - Mar 22 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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