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

The interaction of a femtosecond optical pulse with aFe$_{1}$/(MgO)$_{3}$(001) metal/oxide heterostructure is investigated usingtime-dependent density functional theory (TDDFT) calculations in the real-timedomain. We systematically study electronic excitations as a function of laserfrequency, peak power density and polarization direction. While spin-orbitcoupling is found to result in only a small time-dependent reduction ofmagnetization (less than 10%), we find a marked anisotropy in the response toin-plane and out-of-plane polarized light, which changes its characterqualitatively depending on the excitation energy: the Fe-layer is efficientlyaddressed at low frequencies by in-plane polarized light, whereas forfrequencies higher than the MgO band gap, we find a particularly strongresponse of the central MgO-layer for cross-plane polarized light. For laserexcitations between the charge transfer gap and the MgO band gap, the interfaceplays the most important role, as it mediates concerted transitions from thevalence band of MgO into the $3d$ states of Fe closely above the Fermi leveland from the Fe-states below the Fermi level into the conduction band of MgO.As these transitions can occur simultaneously altering charge balance of thelayers, they could potentially lead to an efficient transfer of excitedcarriers into the MgO bulk, where the corresponding electron and hole statescan be separated by an energy which is significantly larger than the photonenergy.

Anisotropic carrier dynamics in a laser-excited Fe$_{1}$/(MgO)$_{3}$(001) heterostructure from real-time time-dependent DFT