A coherent phonon-induced hidden quadrupolar ordered state in Ca₂RuO₄.

ABSTRACT: Ultrafast laser excitation provides a means to transiently realize long-range ordered electronic states of matter that are hidden in thermal equilibrium. Recently, this approach has unveiled a variety of thermally inaccessible ordered states in strongly correlated materials, including charge density wave, ferroelectric, magnetic, and intertwined charge-orbital ordered states. However, more exotic hidden states exhibiting higher multipolar ordering remain elusive owing to the challenge of directly manipulating and detecting them with light. Here we demonstrate a method to induce a dynamical transition from a thermally allowed to a thermally forbidden spin-orbit entangled quadrupolar ordered state in Ca₂RuO₄ by coherently exciting a phonon that is strongly coupled to th

SUBMITTER: Ning H 

PROVIDER: S-EPMC10716257 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature