English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Pressure-dependent transmittance and reflectance spectra of TiOBr and TiOClsingle crystals at room temperature suggest the closure of the Mott-Hubbardgap, i.e., the gap is filled with additional electronic states extending downto the far-infrared range. According to pressure-dependent x-ray powderdiffraction data the gap closure coincides with a structural phase transition.The transition in TiOBr occurs at slightly lower pressure ($p$=14 GPa) comparedto TiOCl ($p$=16 GPa) under hydrostatic conditions, which is discussed in termsof the chemical pressure effect. The results of pressure-dependenttransmittance measurements on TiOBr at low temperatures reveal similar effectsat 23 K, where the compound is in the spin-Peierls phase at ambient pressure.

Mott-Hubbard gap closure and structural phase transition in the oxyhalides TiOBr and TiOCl under pressure