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

Optical control of structure-driven magnetic order offers a platform formagneto-optical terahertz devices. We control the magnetic phases of $d^1$ Mottinsulating titanates using nonlinear phononics to transiently perturb theatomic structure based on density functional theory (DFT) simulations andsolutions to a lattice Hamiltonian including nonlinear multi-mode interactions.We show that magnetism is tuned by indirect excitation of a Raman-active phononmode, which affects the amplitude of the TiO$_6$ octahedral rotations thatcouple to static Ti--O Jahn-Teller distortions, through infrared-active phononmodes of LaTiO$_3$ and YTiO$_3$. The mode excitation reduces the rotationalangle, driving a magnetic phase transition from ferromagnetic (FM) to $A$-typeantiferromagnetic (AFM), and finally a $G$-type AFM state. This novel $A$-AFMstate arises from a change in the exchange interactions and is absent in thebulk equilibrium phase diagram, but it emerges as a dynamically accessibleoptically induced state under multi-mode excitations. Our work shows nonlinearphononic coupling is able to stabilize phases inaccessible to static chemicalpressure or epitaxial strain.

Nonlinear Phononic Control and Emergent Magnetism in Mott Insulating Titanates