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Disentangling heterogeneity and disorder during ultrafast surface melting of orbital order | |
2024-07-03 | |
状态 | 已发表 |
摘要 | Understanding how light modifies long-range order is key to improve our ability to control material functionality on an ultrafast timescale. Transient spatial heterogeneity has been proposed in many materials, but isolating the dynamics of different regions experimentally has been challenging. Here we address this issue and measure the dynamics of orbital order melting in the layered manganite, La0.5Sr1.5MnO4, and isolate the surface dynamics from the bulk for the first time. Bulk measurements show orbital order is rapidly suppressed, but the correlation length surprisingly increases. However, the surface dynamics, show a stronger suppression and a significant decrease in correlation length. By isolating the surface changes, we find that light preferentially melts a less ordered surface and the loss of long-range order is likely driven by the formation of local and disordered polarons. Melting the disordered surface effectively increases the average correlation of the bulk probed volume, resolving the contradictory response. These results show that surface scattering methods are necessary to understand both surface and bulk dynamics in heterogeneous materials. |
DOI | arXiv:2407.03013 |
相关网址 | 查看原文 |
出处 | Arxiv |
WOS记录号 | PPRN:90686807 |
WOS类目 | Physics, Condensed Matter |
文献类型 | 预印本 |
条目标识符 | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/404291 |
专题 | 物质科学与技术学院 大科学中心_PI研究组_柳学榕组 |
通讯作者 | Liu, Xuerong |
作者单位 | 1.Aarhus Univ, Dept Phys & Astron, Aarhus, Denmark 2.Le Mans Univ, Inst Mol & Materiaux Mans, UMR CNRS 6283, F-72085 Le Mans, France 3.ALBA Synchrotron Light Source, Barcelona, Spain 4.Aarhus Univ, Dept Chem, Aarhus, Denmark 5.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 6.Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England 7.Paul Scherrer Inst, Swiss Light Source, Villigen, Switzerland 8.ShanghaiTech Univ, Ctr Transformat Sci, Shanghai 201210, Peoples R China |
推荐引用方式 GB/T 7714 | Monti, Maurizio,Siddiqui, Khalid M.,Perez-Salinas, Daniel,et al. Disentangling heterogeneity and disorder during ultrafast surface melting of orbital order. 2024. |
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