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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We study the non-degenerate one dimensional two-orbital Hubbard model withinterorbital Coulomb interaction. By means of the density-matrixrenormalization group technique, we calculate the local single-particle densityof states and the optical conductivity at zero temperature. We find that afinite interorbital Coulomb repulsion $V$ generates a new class of stateswithin the Mott-Hubbard band which has a large weight of holon-doublon pairs,which we hence call the holon-doublon band (HDB). When $V$ is sufficientlylarge, the HDB specifies the gapless low-energy excitations, and the systembecomes an unconventional correlated metal. Optical conductivity resultsresolve different metallic behaviors for zero and finite interaction $V$.Compared to the case without interorbital interaction, the conductivity isstrongly reduced in the correlated holon-doublon metal for finite $V$. Inaddition, the absorption spectrum is dominated by the HDB, which is clearlydistinguishable from the Mott-Hubbard band.

Unconventional correlated metallic behavior due to interorbital Coulomb interaction