Surface phases of the transition-metal dichalcogenide IrTe2

Abstract

Transition-metal dichalcogenide IrTe2 has attracted attention because of striped lattice, charge ordering and superconductivity. We have investigated the surface structure of IrTe2, using low energy electron diffraction (LEED) and scanning tunneling microscopy (STM). A complex striped lattice modulations as a function of temperature is observed, which shows hysteresis between cooling and warming. While the bulk 5x1 and 8x1 phases appear at high temperatures, the surface ground state has the 6x1 phase, not seen in the bulk, and the surface transition temperatures are distinct from the bulk. The broken symmetry at the surface creates a quite different phase diagram, with the coexistence of several periodicities resembling devil's staircase behavior.

References in corpus (19)

• Atomically thin MoS2: A new direct-gap semiconductor
• Valley polarization in MoS2 monolayers by optical pumping
• Emerging Device Applications for Semiconducting Two-Dimensional Transition Metal Dichalcogenides
• A quantum phase transition from triangular to stripe charge order in NbSe${}_2$
• 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
• Superconductivity in Cu${}_x$IrTe${}_2$ induced by interlayer hybridization
• Origin of the phase transition in IrTe2: structural modulation and local bonding instability
• The "devil's staircase" type phase transition in NaV2O5 under high pressure
• Hysteretic melting transition of a soliton lattice in a commensurate charge modulation
• Switching of Conducting Planes by Partial Dimer Formation in IrTe${}_2$
• Observation of Devil's Staircase in the Novel Spin Valve System SrCo${}_6$O${}_{11}$
• Hierarchical stripe phases in IrTe2 driven by competition between Ir dimerization and Te bonding
• Structural phase transition induced by van Hove singularity in 5d transition metal compound IrTe2
• Bond-Order and the Role of Ligand States in Stripe-Modulated IrTe2
• Visualization of the effect of structural supermodulation on electronic structure in IrTe${}_2$ by scanning tunneling spectroscopy
• Structural versus electronic distortions of symmetry-broken IrTe${}_2$

Cited by in corpus (11)

• Observation of a uniaxial strain-induced phase transition in the 2D topological semimetal IrTe${}_2$
• Trimer Bonding States on the Surface of Transition-metal Dichalcogenide TaTe2
• Chemical bonding and Born charge in 1T-HfS${}_2$
• Robustness of the charge-ordered phases in IrTe${}_2$ against photoexcitation
• Examining the surface phase diagram of IrTe${}_2$ with photoemission
• 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)${}_4$
• Dimensional crossover of charge order in IrTe${}_2$ with strong interlayer coupling
• Insensitivity of the striped charge-orders in IrTe${}_2$ to alkali surface doping implies their structural origin
• Break of symmetry at the surface of IrTe${}_2$ upon phase transition measured by X-ray photoelectron diffraction