Local Real-Space View of the Achiral 1$T$-TiSe${}_2$ 2 $\times$ 2 $\times$ 2 Charge Density Wave

Abstract

The transition metal dichalcogenide 1$T$-TiSe${}_2$ is a quasi-two-dimensional layered material undergoing a commensurate 2 $\times$ 2 $\times$ 2 charge density wave (CDW) transition with a weak periodic lattice distortion (PLD) below $\approx$ 200 K. Scanning tunneling microscopy (STM) combined with intentionally introduced interstitial Ti atoms allows to go beyond the usual spatial resolution of STM and to intimately probe the three-dimensional character of the PLD. Furthermore, the inversion-symmetric, achiral nature of the CDW in the $z$-direction is revealed, contradicting the claimed existence of helical CDW stacking and associated chiral order. This study paves the way to a simultaneous real-space probing of both charge and structural reconstructions in CDW compounds.

5 pages, 4 figures

References in corpus (4)

• Influence of domain walls in the incommensurate charge density wave state of Cu intercalated 1$T$-TiSe${}_2$
• Doping nature of native defects in 1T-TiSe2
• Stripe and short range order in the charge density wave of 1T-Cu${}_x$TiSe${}_2$
• Local resilience of the $1T$-TiSe${}_2$ charge density wave to Ti self-doping

Cited by in corpus (24)

• Topological kagome magnets and superconductors
• Optical detection and manipulation of spontaneous gyrotropic electronic order in a transition-metal dichalcogenide semimetal
• Optical manipulation of electronic dimensionality in a quantum material
• Direct Visualization of Trimerized States in 1T'-TaTe${}_2$
• Semimetal-to-semiconductor transition and charge-density-wave melting in $1T$-TiSe${}_{2-x}$S${}_x$ single crystals
• Charge Density Wave Hampers Exciton Condensation in 1T-TiSe${}_2$
• Structurally assisted melting of excitonic correlations in 1T-TiSe2
• Correlation between electronic and structural orders in 1T-TiSe2
• Phase Separation in the Vicinity of Fermi Surface Hot Spots
• Unconventional Thermophotonic Charge Density Wave
• Observation of orbital order in the Van der Waals material 1T-TiSe2
• Understanding chiral charge-density wave by frozen chiral phonon
• Uncovering the Hidden Ferroaxial Density Wave as the Origin of the Axial Higgs Mode in RTe${}_3$
• Aspects of symmetry and topology in the charge density wave phase of 1T-TiSe2
• Trigonal-to-monoclinic structural transition in TiSe${}_2$ due to a combined condensation of $\text{q}=(\frac{1}{2},0,0)$ and $(\frac{1}{2},0,\frac{1}{2})$ phonon instabilities
• Observation of giant circular dichroism induced by electronic chirality
• Optically induced symmetry breaking due to nonequilibrium steady state formation in charge density wave material 1T-TiSe2
• Impact ionization dynamics in small band-gap 2D materials from a coherent phonon mechanism
• Two-dimensional chiral stacking orders in quasi-one-dimensional charge density waves
• Photo-induced Dynamics and Momentum Distribution of Chiral Charge Density Waves in 1T-TiSe${}_2$
• Non-chiral 1T-TiSe2 creates circular dichroism in resonant X-ray diffraction via multipole scattering interference
• Cluster charge-density-wave glass in hydrogen-intercalated TiSe${}_2$
• Doping-induced nematic and stripe orders within the charge density wave state of TiSe${}_2$
• Revisiting the charge-density-wave superlattice of 1$T$-TiSe${}_2$