Doping nature of native defects in 1T-TiSe2

Abstract

The transition metal dichalcogenide 1T-TiSe2 is a quasi two-dimensional layered material with a charge density wave (CDW) transition temperature of TCDW 200 K. Self-doping effects for crystals grown at different temperatures introduce structural defects, modify the temperature dependent resistivity and strongly perturbate the CDW phase. Here we study the structural and doping nature of such native defects combining scanning tunneling microscopy/spectroscopy and ab initio calculations. The dominant native single atom dopants we identify in our single crystals are intercalated Ti atoms, Se vacancies and Se substitutions by residual iodine and oxygen.

arXiv comment5 pages, 3 figures

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• Atomically precise placement of single dopants in Si
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• Short-range phase coherence and origin of the 1T-TiSe2 charge density wave
• The Role of Transport Agents in MoS2 Single Crystals
• STM microscopy of the CDW in 1T-TiSe2 in the presence of single atom defects
• Fermi surface reconstruction and electron dynamics at the charge-density-wave transition in TiSe2
• Local Real-Space View of the Achiral 1$T$-TiSe${}_2$ 2 $\times$ 2 $\times$ 2 Charge Density Wave
• On the origin of the anomalous peak in the resistivity of TiSe${}_2$
• Semimetal-to-semiconductor transition and charge-density-wave melting in $1T$-TiSe${}_{2-x}$S${}_x$ single crystals
• Semiconductor-metal phase transition and emergent charge density waves in 1T-ZrX${}_2$ (X = Se, Te) at the two-dimensional limit
• Correlation between crystal purity and the charge density wave in 1$T$-VSe${}_2$
• Dramatic Plasmon Response to the Charge-Density-Wave Gap Development in $1\text{T}-{\mathrm{TiSe}}_2$
• Energy-dependent spatial texturing of the charge order in $1T$-Cu${}_x$TiSe${}_2$
• Intrinsic Insulating Ground State in Transition Metal Dichalcogenide TiSe2
• Unveiling the Charge Density Wave Inhomogeneity and Pseudogap State in 1T-TiSe2
• Local resilience of the $1T$-TiSe${}_2$ charge density wave to Ti self-doping
• Electrical Stressing Induced Monolayer Vacancy Island Growth on TiSe2
• Charge-Density Waves vs. Superconductivity: Some Results and Future Perspectives
• A Pathway to Efficient Simulations of Charge Density Waves in Transition Metal Dichalcogenides: A Case Study for TiSe2
• Perturbation of charge density waves in 1T-TiSe${}_2$
• Carrier-Density Control of the Quantum-Confined 1$T$-TiSe${}_2$ Charge-Density-Wave
• Lifshitz transition enabling superconducting dome around the quantum critical point in TiSe${}_2$
• Cluster charge-density-wave glass in hydrogen-intercalated TiSe${}_2$
• Intrinsic Point Defects in Ultrathin 1T-PtSe2 Layers
• Building bridges: matching density functional theory with experiment
• Melting point depression of charge density wave in 1T-TiSe${}_2$ due to size effects
• Metal-to-insulator transition in Pt-doped TiSe${}_2$ driven by emergent network of narrow transport channels