Amplitude dynamics of the charge density wave in LaTe[subscript 3]: Theoretical description of pump-probe experiments
We formulate a dynamical model to describe a photoinduced charge density wave (CDW) quench transition and apply it to recent multiprobe experiments on LaTe[subscript 3] [A. Zong et al., Nat. Phys. 15, 27 (2019)1745-247310.1038/s41567-018-0311-9]. Our approach relies on coupled time-dependent Ginzbur...
| Main Authors: | , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2020
|
| Online Access: | https://hdl.handle.net/1721.1/125434 |
| _version_ | 1826203835977170944 |
|---|---|
| author | Dolgirev, Pavel E. Rozhkov, A. V. Zong, Alfred Kogar, Anshul Gedik, Nuh Fine, Boris V. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Dolgirev, Pavel E. Rozhkov, A. V. Zong, Alfred Kogar, Anshul Gedik, Nuh Fine, Boris V. |
| author_sort | Dolgirev, Pavel E. |
| collection | MIT |
| description | We formulate a dynamical model to describe a photoinduced charge density wave (CDW) quench transition and apply it to recent multiprobe experiments on LaTe[subscript 3] [A. Zong et al., Nat. Phys. 15, 27 (2019)1745-247310.1038/s41567-018-0311-9]. Our approach relies on coupled time-dependent Ginzburg-Landau equations tracking two order parameters that represent the modulations of the electronic density and the ionic positions. We aim at describing the amplitude of the order parameters under the assumption that they are homogeneous in space. This description is supplemented by a three-temperature model, which treats separately the electronic temperature, temperature of the lattice phonons with stronger couplings to the electronic subsystem, and temperature of all other phonons. The broad scope of available data for LaTe[subscript 3] and similar materials as well as the synergy between different time-resolved spectroscopies allow us to extract model parameters. The resulting calculations are in good agreement with ultrafast electron diffraction experiments, reproducing qualitative and quantitative features of the CDW amplitude evolution during the initial few picoseconds after photoexcitation. Keywords: Charge density waves; Nonequilibrium systesm; Pump-probe spectroscopy; Time-dependent Ginzburg-Landau theory |
| first_indexed | 2024-09-23T12:44:00Z |
| format | Article |
| id | mit-1721.1/125434 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T12:44:00Z |
| publishDate | 2020 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1254342022-09-28T09:45:09Z Amplitude dynamics of the charge density wave in LaTe[subscript 3]: Theoretical description of pump-probe experiments Dolgirev, Pavel E. Rozhkov, A. V. Zong, Alfred Kogar, Anshul Gedik, Nuh Fine, Boris V. Massachusetts Institute of Technology. Department of Physics We formulate a dynamical model to describe a photoinduced charge density wave (CDW) quench transition and apply it to recent multiprobe experiments on LaTe[subscript 3] [A. Zong et al., Nat. Phys. 15, 27 (2019)1745-247310.1038/s41567-018-0311-9]. Our approach relies on coupled time-dependent Ginzburg-Landau equations tracking two order parameters that represent the modulations of the electronic density and the ionic positions. We aim at describing the amplitude of the order parameters under the assumption that they are homogeneous in space. This description is supplemented by a three-temperature model, which treats separately the electronic temperature, temperature of the lattice phonons with stronger couplings to the electronic subsystem, and temperature of all other phonons. The broad scope of available data for LaTe[subscript 3] and similar materials as well as the synergy between different time-resolved spectroscopies allow us to extract model parameters. The resulting calculations are in good agreement with ultrafast electron diffraction experiments, reproducing qualitative and quantitative features of the CDW amplitude evolution during the initial few picoseconds after photoexcitation. Keywords: Charge density waves; Nonequilibrium systesm; Pump-probe spectroscopy; Time-dependent Ginzburg-Landau theory 2020-05-22T20:44:45Z 2020-05-22T20:44:45Z 2020-02 2019-12 2020-02-12T15:06:42Z Article http://purl.org/eprint/type/JournalArticle 2469-9969 2469-9950 https://hdl.handle.net/1721.1/125434 Dolgirev, Pavel E., et al. "Amplitude dynamics of the charge density wave in LaTe3: Theoretical description of pump-probe experiments." Physical Review B, 101, 5 (February 2020): 054203. ©2020 American Physical Society en http://dx.doi.org/10.1103/PhysRevB.101.054203 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 | Dolgirev, Pavel E. Rozhkov, A. V. Zong, Alfred Kogar, Anshul Gedik, Nuh Fine, Boris V. Amplitude dynamics of the charge density wave in LaTe[subscript 3]: Theoretical description of pump-probe experiments |
| title | Amplitude dynamics of the charge density wave in LaTe[subscript 3]: Theoretical description of pump-probe experiments |
| title_full | Amplitude dynamics of the charge density wave in LaTe[subscript 3]: Theoretical description of pump-probe experiments |
| title_fullStr | Amplitude dynamics of the charge density wave in LaTe[subscript 3]: Theoretical description of pump-probe experiments |
| title_full_unstemmed | Amplitude dynamics of the charge density wave in LaTe[subscript 3]: Theoretical description of pump-probe experiments |
| title_short | Amplitude dynamics of the charge density wave in LaTe[subscript 3]: Theoretical description of pump-probe experiments |
| title_sort | amplitude dynamics of the charge density wave in late subscript 3 theoretical description of pump probe experiments |
| url | https://hdl.handle.net/1721.1/125434 |
| work_keys_str_mv | AT dolgirevpavele amplitudedynamicsofthechargedensitywaveinlatesubscript3theoreticaldescriptionofpumpprobeexperiments AT rozhkovav amplitudedynamicsofthechargedensitywaveinlatesubscript3theoreticaldescriptionofpumpprobeexperiments AT zongalfred amplitudedynamicsofthechargedensitywaveinlatesubscript3theoreticaldescriptionofpumpprobeexperiments AT kogaranshul amplitudedynamicsofthechargedensitywaveinlatesubscript3theoreticaldescriptionofpumpprobeexperiments AT gediknuh amplitudedynamicsofthechargedensitywaveinlatesubscript3theoreticaldescriptionofpumpprobeexperiments AT fineborisv amplitudedynamicsofthechargedensitywaveinlatesubscript3theoreticaldescriptionofpumpprobeexperiments |