Optical gyrotropy and the nonlocal Hall effect in chiral charge-ordered TiSe2

Martin Gradhand, Jasper van Wezel

Research output: Contribution to journalArticle (Academic Journal)peer-review

4 Citations (Scopus)
341 Downloads (Pure)


It has been suggested that materials which break spatial inversion symmetry, but not time reversal symmetry, will be optically gyrotropic and display a nonlocal Hall effect. The associated optical rotary power and the suggested possibility of inducing a Kerr effect in such materials, in turn, are central to recent discussions about the nature of the pseudogap phases of various cuprate high-temperature superconductors. In this Rapid Communication, we show that optical gyrotropy and the nonlocal Hall effect provide a sensitive probe of broken inversion symmetry in $1T$−TiSe$_2$. This material was recently found to possess a chiral charge-ordered phase at low temperatures, in which inversion symmetry is spontaneously broken, while time reversal symmetry remains unbroken throughout its phase diagram. We estimate the magnitude of the resulting gyrotropic constant and optical rotary power (the Faraday effect at zero applied field) and suggest that $1T$−TiSe$_2$ may be employed as a model material in the interpretation of measurements on cuprate superconductors.
Original languageEnglish
Article number041111(R)
Number of pages5
JournalPhysical Review B: Condensed Matter and Materials Physics
Issue number4
Publication statusPublished - 13 Jul 2015


  • cond-mat.str-el
  • cond-mat.mtrl-sci


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