Correlation between electronic and structural orders in 1T-TiSe2

Abstract

The correlation between electronic and crystal structures of 1T-TiSe2 in the charge density wave (CDW) state is studied by x-ray diffraction. Three families of reflections are used to probe atomic displacements and the orbital asymmetry in Se. Two distinct onset temperatures are found, TCDW and a lower T* indicative for an onset of Se out-of-plane atomic displacements. T* coincides with a DC resistivity maximum and the onset of the proposed gyrotropic electronic structure. However, no indication for chirality is found. The relation between the atomic displacements and the transport properties is discussed in terms of Ti 3d and Se 4p states that only weakly couple to the CDW order.

arXiv comment16 pages, 4 figures + 13 pages supplementary info

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Cited by in corpus (8)

• Observation of orbital order in the Van der Waals material 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
• Origin of chirality in transition-metal dichalcogenides
• 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
• Optical amplification in a CDW-phase of a quasi-two dimensional material
• Doping-induced nematic and stripe orders within the charge density wave state of TiSe${}_2$