Anionic depolymerization transition in IrTe2

Abstract

Selenium (Se) substitution drastically increases the transition temperature of iridium ditelluride (IrTe${}_2$) to a diamagnetic superstructure from 278 K to 560 K. Transmission electron microscopy experiments revealed that this enhancement is accompanied by the evolution of non-sinusoidal structure modulations from $q=1/5(10\bar{1})$- to $q=1/6(10\bar{1})$-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 IrTe${}_2$ is unique in crystalline inorganic solids.

5 pages, 4 figures, Phys. Rev. Lett. in press

References in corpus (1)

• Superconductivity at 36 K in beta-Fe1.01Se with the compression of the interlayer separation under pressure

Cited by in corpus (8)

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• Structural phase transition and electronic structure evolution in Ir1-xPtxTe2 studied by scanning tunneling microscopy
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• Visualizing the Pt doping effect on surface and electronic structure in Ir_{1-x}Pt_{x}Te_{2} by scanning tunneling microscopy and spectroscopy
• Effect of Pt substitution on the electronic structure of AuTe2
• Fermi surface of IrTe2 in the valence-bond state as determined by quantum oscillations