Dimensional crossover of charge order in IrTe${}_2$ with strong interlayer coupling

Abstract

Tuning dimensionality in van der Waals materials with finite interlayer coupling has introduced various electronic phase transitions by conventional mechanical exfoliation. Particularly when the electronic order is tied to the modulation of the interlayer coupling, such dimensional tunability has a strong impact on its stability and properties, which has rarely been investigated experimentally. Here, we demonstrate a dimensional crossover of charge order in IrTe${}_2$ from genuine two- to quasi-three-dimension using low-temperature scanning tunneling microscopy and spectroscopy. Employing atomically thin IrTe${}_2$ flakes ranging from monolayer to multilayer, we observe a gradual phase transition of charge order and exponential decay of Coulomb gap with increasing thickness. Moreover, we find a suppression of the density of states emerging at an abrupt lateral interface between two- and three-dimension. These findings are attributed to the interplay between the strongly coupled layers and substrate-driven perturbation, which can provide a new insight into the dimensional crossover of strongly coupled layered materials with hidden electronic phases.

arXiv comment8 pages, 6 figures

References in corpus (27)

• Gate-tunable Room-temperature Ferromagnetism in Two-dimensional Fe${}_3$GeTe${}_2$
• Dimensional crossover of thermal transport in few-layer graphene materials
• Evidence of Ising pairing in superconducting NbSe${}_2$ atomic layers
• Strongly enhanced charge-density-wave order in monolayer NbSe${}_2$
• Gate-tunable Phase Transitions in 1T-TaS${}_2$
• Thickness-Dependent Differential Reflectance Spectra of Monolayer and Few-Layer MoS2, MoSe2, WS2 and WSe2
• Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe2
• Competition of superconductivity and charge density wave in selective oxidized CsV3Sb5 thin flakes
• Dimerization-Induced Cross-Layer Quasi-Two-Dimensionality in Metallic Iridate IrTe2
• Anionic depolymerization transition in IrTe2
• Orbital Degeneracy and Peierls Instability in Triangular Lattice Superconductor Ir${}_{1-x}$Pt${}_x$Te${}_2$
• Superconductivity in Cu${}_x$IrTe${}_2$ induced by interlayer hybridization
• Dimensional cross-over of the charge density wave order parameter in thin exfoliated 1T-VSe${}_2$
• Distinguishing a Mott Insulator from a Trivial Insulator with Atomic Adsorbates
• Hysteretic melting transition of a soliton lattice in a commensurate charge modulation
• Direct imaging of antiferromagnetic domains and anomalous layer-dependent mirror symmetry breaking in atomically thin MnPS${}_3$
• Observation of a uniaxial strain-induced phase transition in the 2D topological semimetal IrTe${}_2$
• Superconductivity emerging from a stripe charge order in IrTe2 nanoflakes
• Hierarchical stripe phases in IrTe2 driven by competition between Ir dimerization and Te bonding
• Large-gap insulating dimer ground state in monolayer IrTe2
• Kinetic approach to superconductivity hidden behind a competing order
• Surface phases of the transition-metal dichalcogenide IrTe2
• Nanoscale Superconducting Honeycomb Charge Order in IrTe2
• Visualization of the effect of structural supermodulation on electronic structure in IrTe${}_2$ by scanning tunneling spectroscopy
• Dimensional crossover and symmetry transformation of the charge density waves in VSe2
• Competition between disorder and Coulomb interaction in a two-dimensional plaquette Hubbard model
• Local Spectroscopies Reveal Percolative Metal in Disordered Mott Insulators

Cited by in corpus (1)

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