Structural versus electronic distortions of symmetry-broken IrTe${}_2$

Abstract

We investigate atomic and electronic structures of the intriguing low temperature phase of IrTe2 using high-resolution scanning tunneling microscopy and spectroscopy. We confirm various stripe superstructures such as $\times$3, $\times$5, and $\times$8. The strong vertical and lateral distortions of the lattice for the stripe structures are observed in agreement with recent calculations. The spatial modulations of electronic density of states are clearly identified as separated from the structural distortions. These structural and spectroscopic characteristics are not consistent with the charge-density wave and soliton lattice model proposed recently. Instead, we show that the Ir (Te) dimerization together with the Ir 5d charge ordering can explain these superstructures, supporting the Ir dimerization mechanism of the phase transition.

arXiv comment5 pages, 4 figures

References in corpus (23)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Topological Field Theory of Time-Reversal Invariant Insulators
• Topological invariants of time-reversal-invariant band structures
• A generic new platform for topological quantum computation using semiconductor heterostructures
• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Three dimensional topological invariants for time reversal invariant Hamiltonians and the three dimensional quantum spin Hall effect
• Topological odd-parity superconductors
• Atomic-scale images of charge ordering in a mixed-valence manganite
• Majorana Fermions and Exotic Surface Andreev Bound States in Topological Superconductors: Application to CuxBi2Se3
• Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe2
• Structural phase transition in IrTe${}_2$: A combined study of optical spectroscopy and band structure calculations
• Dimerization-Induced Cross-Layer Quasi-Two-Dimensionality in Metallic Iridate IrTe2
• Anionic depolymerization transition in IrTe2
• Microscopic evidence for strong periodic lattice distortion in 2D charge-density wave systems
• Electronic structure reconstruction by orbital symmetry breaking in IrTe2
• Origin of the phase transition in IrTe2: structural modulation and local bonding instability
• Hysteretic melting transition of a soliton lattice in a commensurate charge modulation
• Visualization of the effect of structural supermodulation on electronic structure in IrTe${}_2$ by scanning tunneling spectroscopy
• Fully Gapped s-wave-like Superconducting State and Electronic Structures in the Ir0.95Pd0.05Te2 Single Crystals with Strong Spin-orbital Coupling

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• Surface phases of the transition-metal dichalcogenide IrTe2
• Nanoscale Superconducting Honeycomb Charge Order in IrTe2
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• Structural phase transition and electronic structure evolution in Ir1-xPtxTe2 studied by scanning tunneling microscopy
• Charge-Stripe Order and Superconductivity in $\mathrm{I}{\mathrm{r}}_{1-\mathrm{x}}\mathrm{P}{\mathrm{t}}_{\mathrm{x}}\mathrm{T}{\mathrm{e}}_2$