Ultrafast surface melting of orbital order in La0.5Sr1.5MnO4
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2024
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866908587960303616 |
|---|---|
| author | Monti, Maurizio Siddiqui, Khalid M. Perez-Salinas, Daniel Agarwal, Naman Bremholm, Martin Li, Xiang Prabhakaran, Dharmalingam Liu, Xin Babich, Danylo Sander, Mathias Deng, Yunpei Lemke, Henrik T. Mankowsky, Roman Liu, Xuerong Wall, Simon E. |
| author_facet | Monti, Maurizio Siddiqui, Khalid M. Perez-Salinas, Daniel Agarwal, Naman Bremholm, Martin Li, Xiang Prabhakaran, Dharmalingam Liu, Xin Babich, Danylo Sander, Mathias Deng, Yunpei Lemke, Henrik T. Mankowsky, Roman Liu, Xuerong Wall, Simon E. |
| contents | Understanding how light modifies long-range order in quantum materials is key to improving our ability to control functionality. However, this is challenging if the response is heterogeneous. Here we address the most common form of light-induced heterogeneity, surface melting, and measure the dynamics of orbital order in the layered manganite, La0.5Sr1.5MnO4. We isolate the surface dynamics from the bulk by measuring the orbital truncation rod as well as orbital Bragg peak. After photoexcitation, the orbital Bragg peak shows an unusual narrowing, which suggests an increase in the correlation length in the probed volume. In contrast, the correlation length at the surface decreases. These differences can be reconciled if the material is heterogeneous, and light melts a less ordered surface. By isolating the surface response, we determine that the loss of long-range order is an incoherent process, which is likely accompanied by the formation of local polarons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_03013 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Ultrafast surface melting of orbital order in La0.5Sr1.5MnO4 Monti, Maurizio Siddiqui, Khalid M. Perez-Salinas, Daniel Agarwal, Naman Bremholm, Martin Li, Xiang Prabhakaran, Dharmalingam Liu, Xin Babich, Danylo Sander, Mathias Deng, Yunpei Lemke, Henrik T. Mankowsky, Roman Liu, Xuerong Wall, Simon E. Strongly Correlated Electrons Materials Science Understanding how light modifies long-range order in quantum materials is key to improving our ability to control functionality. However, this is challenging if the response is heterogeneous. Here we address the most common form of light-induced heterogeneity, surface melting, and measure the dynamics of orbital order in the layered manganite, La0.5Sr1.5MnO4. We isolate the surface dynamics from the bulk by measuring the orbital truncation rod as well as orbital Bragg peak. After photoexcitation, the orbital Bragg peak shows an unusual narrowing, which suggests an increase in the correlation length in the probed volume. In contrast, the correlation length at the surface decreases. These differences can be reconciled if the material is heterogeneous, and light melts a less ordered surface. By isolating the surface response, we determine that the loss of long-range order is an incoherent process, which is likely accompanied by the formation of local polarons. |
| title | Ultrafast surface melting of orbital order in La0.5Sr1.5MnO4 |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2407.03013 |