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

Taking account of a collective mode relevant to charge fluctuation, theoptical conductivity of spin-density-wave state has been examined for anextended Hubbard model with one-dimensional quarter-filled band. We find that,within the random phase approximation, the conductivity exhibits several peaksat the frequency corresponding to the excitation energy of the commensuratecollective mode. When charge ordering appears with increasing inter-siterepulsive interactions, the main peak with the lowest frequency is reduced andthe effective mass of the mode is enhanced indicating the suppression of theeffect of the collective mode by charge ordering. It is also shown that thereflectivity becomes large in a wide range of frequency due to the hugedielectric constant induced by the collective mode.Comment: 11 pages, 16 figure

Role of Collective Mode for Optical Conductivity and Reflectivity in Quarter-Filled Spin–Density–Wave State