Abstract
The correlation between electronic and crystal structures of 1T−TiSe2 in the charge-density wave (CDW) state is studied by x-ray diffraction in order to clarify basic properties in the CDW state, transport properties, and chirality. Three families of reflections are used to probe atomic displacements and the orbital asymmetry in Se. Two distinct onset temperatures are found: T_CDW 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 (chiral) 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. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000477457Publikationsstatus
publishedExterne Links
Zeitschrift / Serie
Physical Review ResearchBand
Seiten / Artikelnummer
Verlag
American Physical SocietyThema
charge density waves; crystal symmetry; electrical conductivity; structural order parameter; transition-metal dichalcogenide; resonant elastic x-ray scattering; x-ray diffractionOrganisationseinheit
03920 - Johnson, Steven / Johnson, Steven
Förderung
147606 - Toroidal moments and magnetic monopoles as complementary condensed-matter states (SNF)
NCCR MUST (183615) - NCCR MUST Verteilfonds (SNF)
--- - NCCR MARVEL Agility Plus Projekt (SNF)
801459 - Fellowship Program of the NCCR MUST (National Competence Center for Research in Molecular Ultrafast Science and Technology) and the Cluster of Excellence RESOLV (EC)