Dimerization-Induced Fermi-Surface Reconstruction in IrTe2

Abstract

We report a de Haas-van Alphen (dHvA) oscillation study on IrTe2 single crystals showing complex dimer formations. By comparing the angle dependence of dHvA oscillations with band structure calculations, we show distinct Fermi surface reconstruction induced by a 1/5-type and a 1/8-type dimerizations. This verifies that an intriguing quasi-two-dimensional conducting plane across the layers is induced by dimerization in both cases. A phase transition to the 1/8 phase with higher dimer density reveals that local instabilities associated with intra- and interdimer couplings are the main driving force for complex dimer formations in IrTe2.

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

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• Superconductivity emerging from a stripe charge order in IrTe2 nanoflakes
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• Kinetic approach to superconductivity hidden behind a competing order
• Nanoscale Superconducting Honeycomb Charge Order in IrTe2
• Structural phase transition and electronic structure evolution in Ir1-xPtxTe2 studied by scanning tunneling microscopy
• Charge-Stripe Order and Superconductivity in $\mathrm{I}{\mathrm{r}}_{1-\mathrm{x}}\mathrm{P}{\mathrm{t}}_{\mathrm{x}}\mathrm{T}{\mathrm{e}}_2$
• Spatially-resolved electronic structure of stripe domains in IrTe${}_2$ through electronic structure microscopy
• Size effects on supercooling phenomena in strongly correlated electron systems: IrTe${}_2$ and $\theta$-(BEDT-TTF)${}_2$RbZn(SCN)${}_4$
• Real-space observation of emergent complexity of phase evolution in micrometer-sized IrTe${}_2$ crystals
• Fermi surface of IrTe2 in the valence-bond state as determined by quantum oscillations
• Umklapp-driven first-order transition into a charge-density wave phase
• Interrupted orbital motion in density-wave systems