Ultrafast dynamics in the presence of antiferromagnetic correlations in electron-doped cuprate La[subscript 2 − x] Ce[subscript x] CuO[subscript 4 ± δ]
We used femtosecond optical pump-probe spectroscopy to study the photoinduced change in reflectivity of thin films of the electron-doped cuprate La[subscript 2−x]Ce[subscript x]CuO[subscript 4] (LCCO) with dopings of x=0.08 (underdoped) and x=0.11 (optimally doped). Above T[subscript c], we observe...
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| Format: | Article |
| Language: | English |
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American Physical Society
2017
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| Online Access: | http://hdl.handle.net/1721.1/109835 https://orcid.org/0000-0002-7903-0960 https://orcid.org/0000-0002-9641-3453 https://orcid.org/0000-0002-7183-5203 https://orcid.org/0000-0002-6394-4987 |
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| author | Higgins, J. Greene, R. L. Vishik, Inna Mahmood, Fahad Alpichshev, Zhanybek Gedik, Nuh |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Higgins, J. Greene, R. L. Vishik, Inna Mahmood, Fahad Alpichshev, Zhanybek Gedik, Nuh |
| author_sort | Higgins, J. |
| collection | MIT |
| description | We used femtosecond optical pump-probe spectroscopy to study the photoinduced change in reflectivity of thin films of the electron-doped cuprate La[subscript 2−x]Ce[subscript x]CuO[subscript 4] (LCCO) with dopings of x=0.08 (underdoped) and x=0.11 (optimally doped). Above T[subscript c], we observe fluence-dependent relaxation rates that begin at a temperature similar to the one where transport measurements first show signatures of antiferromagnetic correlations. Upon suppressing superconductivity with a magnetic field, it is found that the fluence and temperature dependence of relaxation rates are consistent with bimolecular recombination of electrons and holes across a gap (2Δ[subscript AF]) originating from antiferromagnetic correlations which comprise the pseudogap in electron-doped cuprates. This can be used to learn about coupling between electrons and high-energy (ω>2Δ[subscript AF]) excitations in these compounds and set limits on the time scales on which antiferromagnetic correlations are static. |
| first_indexed | 2024-09-23T15:13:14Z |
| format | Article |
| id | mit-1721.1/109835 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:13:14Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1098352022-09-29T13:28:32Z Ultrafast dynamics in the presence of antiferromagnetic correlations in electron-doped cuprate La[subscript 2 − x] Ce[subscript x] CuO[subscript 4 ± δ] Ultrafast dynamics in the presence of antiferromagnetic correlations in electron-doped cuprate La 2 − x Ce x CuO 4 ± δ Higgins, J. Greene, R. L. Vishik, Inna Mahmood, Fahad Alpichshev, Zhanybek Gedik, Nuh Massachusetts Institute of Technology. Department of Physics Vishik, Inna Mahmood, Fahad Alpichshev, Zhanybek Gedik, Nuh We used femtosecond optical pump-probe spectroscopy to study the photoinduced change in reflectivity of thin films of the electron-doped cuprate La[subscript 2−x]Ce[subscript x]CuO[subscript 4] (LCCO) with dopings of x=0.08 (underdoped) and x=0.11 (optimally doped). Above T[subscript c], we observe fluence-dependent relaxation rates that begin at a temperature similar to the one where transport measurements first show signatures of antiferromagnetic correlations. Upon suppressing superconductivity with a magnetic field, it is found that the fluence and temperature dependence of relaxation rates are consistent with bimolecular recombination of electrons and holes across a gap (2Δ[subscript AF]) originating from antiferromagnetic correlations which comprise the pseudogap in electron-doped cuprates. This can be used to learn about coupling between electrons and high-energy (ω>2Δ[subscript AF]) excitations in these compounds and set limits on the time scales on which antiferromagnetic correlations are static. Gordon and Betty Moore Foundation (EPiQS Initiative Grant GBMF4540) United States. Air Force. Office of Scientific Research (FA95501410332) National Science Foundation (U.S.) (DMR1410665) 2017-06-13T19:09:02Z 2017-06-13T19:09:02Z 2017-03 2017-01 2017-03-13T22:00:16Z Article http://purl.org/eprint/type/JournalArticle 2469-9950 2469-9969 http://hdl.handle.net/1721.1/109835 Vishik, I. M. et al. “Ultrafast Dynamics in the Presence of Antiferromagnetic Correlations in Electron-Doped Cuprate La[subscript 2 - X] Ce[subscript X] CuO [subscript 4±δ]” Physical Review B 95.11 (2017): n. pag. © 2017 American Physical Society https://orcid.org/0000-0002-7903-0960 https://orcid.org/0000-0002-9641-3453 https://orcid.org/0000-0002-7183-5203 https://orcid.org/0000-0002-6394-4987 en http://dx.doi.org/10.1103/PhysRevB.95.115125 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Higgins, J. Greene, R. L. Vishik, Inna Mahmood, Fahad Alpichshev, Zhanybek Gedik, Nuh Ultrafast dynamics in the presence of antiferromagnetic correlations in electron-doped cuprate La[subscript 2 − x] Ce[subscript x] CuO[subscript 4 ± δ] |
| title | Ultrafast dynamics in the presence of antiferromagnetic correlations in electron-doped cuprate La[subscript 2 − x] Ce[subscript x] CuO[subscript 4 ± δ] |
| title_full | Ultrafast dynamics in the presence of antiferromagnetic correlations in electron-doped cuprate La[subscript 2 − x] Ce[subscript x] CuO[subscript 4 ± δ] |
| title_fullStr | Ultrafast dynamics in the presence of antiferromagnetic correlations in electron-doped cuprate La[subscript 2 − x] Ce[subscript x] CuO[subscript 4 ± δ] |
| title_full_unstemmed | Ultrafast dynamics in the presence of antiferromagnetic correlations in electron-doped cuprate La[subscript 2 − x] Ce[subscript x] CuO[subscript 4 ± δ] |
| title_short | Ultrafast dynamics in the presence of antiferromagnetic correlations in electron-doped cuprate La[subscript 2 − x] Ce[subscript x] CuO[subscript 4 ± δ] |
| title_sort | ultrafast dynamics in the presence of antiferromagnetic correlations in electron doped cuprate la subscript 2 x ce subscript x cuo subscript 4 δ |
| url | http://hdl.handle.net/1721.1/109835 https://orcid.org/0000-0002-7903-0960 https://orcid.org/0000-0002-9641-3453 https://orcid.org/0000-0002-7183-5203 https://orcid.org/0000-0002-6394-4987 |
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