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Laser-induced transient magnons in Sr3Ir2O7 throughout the Brillouin zone.

ABSTRACT: Although ultrafast manipulation of magnetism holds great promise for new physical phenomena and applications, targeting specific states is held back by our limited understanding of how magnetic correlations evolve on ultrafast timescales. Using ultrafast resonant inelastic X-ray scattering we demonstrate that femtosecond laser pulses can excite transient magnons at large wavevectors in gapped antiferromagnets and that they persist for several picoseconds, which is opposite to what is observed in nearly gapless magnets. Our work suggests that materials with isotropic magnetic interactions are preferred to achieve rapid manipulation of magnetism.

SUBMITTER: Mazzone DG 

PROVIDER: S-EPMC8179144 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature

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Laser-induced transient magnons in Sr<sub>3</sub>Ir<sub>2</sub>O<sub>7</sub> throughout the Brillouin zone.

Mazzone Daniel G DG   Meyers Derek D   Cao Yue Y   Vale James G JG   Dashwood Cameron D CD   Shi Youguo Y   James Andrew J A AJA   Robinson Neil J NJ   Lin Jiaqi J   Thampy Vivek V   Tanaka Yoshikazu Y   Johnson Allan S AS   Miao Hu H   Wang Ruitang R   Assefa Tadesse A TA   Kim Jungho J   Casa Diego D   Mankowsky Roman R   Zhu Diling D   Alonso-Mori Roberto R   Song Sanghoon S   Yavas Hasan H   Katayama Tetsuo T   Yabashi Makina M   Kubota Yuya Y   Owada Shigeki S   Liu Jian J   Yang Junji J   Konik Robert M RM   Robinson Ian K IK   Hill John P JP   McMorrow Desmond F DF   Först Michael M   Wall Simon S   Liu Xuerong X   Dean Mark P M MPM  

Proceedings of the National Academy of Sciences of the United States of America 20210601 22

Although ultrafast manipulation of magnetism holds great promise for new physical phenomena and applications, targeting specific states is held back by our limited understanding of how magnetic correlations evolve on ultrafast timescales. Using ultrafast resonant inelastic X-ray scattering we demonstrate that femtosecond laser pulses can excite transient magnons at large wavevectors in gapped antiferromagnets and that they persist for several picoseconds, which is opposite to what is observed in  ...[more]

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