Investigation of the non-equilibrium state of strongly correlated materials by complementary ultrafast spectroscopy techniques
Photoinduced non-thermal phase transitions are new paradigms of exotic non-equilibrium physics of strongly correlated materials. An ultrashort optical pulse can drive the system to a new order through complex microscopic interactions that do not occur in the equilibrium state. Ultrafast spectroscopi...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/abe272 |
| _version_ | 1797750202882326528 |
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| author | H Hedayat C J Sayers A Ceraso J van Wezel S R Clark C Dallera G Cerullo E Da Como E Carpene |
| author_facet | H Hedayat C J Sayers A Ceraso J van Wezel S R Clark C Dallera G Cerullo E Da Como E Carpene |
| author_sort | H Hedayat |
| collection | DOAJ |
| description | Photoinduced non-thermal phase transitions are new paradigms of exotic non-equilibrium physics of strongly correlated materials. An ultrashort optical pulse can drive the system to a new order through complex microscopic interactions that do not occur in the equilibrium state. Ultrafast spectroscopies are unique tools to reveal the underlying mechanisms of such transitions which lead to transient phases of matter. Yet, their individual specificities often do not provide an exhaustive picture of the physical problem. One effective solution to enhance their performance is the integration of different ultrafast techniques. This provides an opportunity to simultaneously probe physical phenomena from different perspectives while maintaining the same experimental conditions. In this context, we performed complementary experiments by combining time-resolved reflectivity and time and angle-resolved photoemission spectroscopy. We demonstrate the advantage of this combined approach by investigating the complex charge density wave (CDW) phase in 1 T -TiSe _2 . Specifically, we show the key role of lattice degrees of freedom to establish and stabilize the CDW in this material. |
| first_indexed | 2024-03-12T16:29:18Z |
| format | Article |
| id | doaj.art-3b8f1b64e8644ea0a689735288f57e82 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:29:18Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-3b8f1b64e8644ea0a689735288f57e822023-08-08T15:33:11ZengIOP PublishingNew Journal of Physics1367-26302021-01-0123303302510.1088/1367-2630/abe272Investigation of the non-equilibrium state of strongly correlated materials by complementary ultrafast spectroscopy techniquesH Hedayat0https://orcid.org/0000-0002-0704-0983C J Sayers1https://orcid.org/0000-0002-3777-5155A Ceraso2J van Wezel3S R Clark4https://orcid.org/0000-0002-2072-7499C Dallera5G Cerullo6E Da Como7E Carpene8https://orcid.org/0000-0003-3867-8178IFN-CNR, Dipartimento di Fisica , Politecnico di Milano, 20133 Milano, Italy; Dipartimento di Fisica , Politecnico di Milano, 20133 Milano, ItalyDipartimento di Fisica , Politecnico di Milano, 20133 Milano, Italy; Department of Physics and Centre for Photonics and Photonic Materials, University of Bath , BA2 7AY Bath, United KingdomIFN-CNR, Dipartimento di Fisica , Politecnico di Milano, 20133 Milano, Italy; Dipartimento di Fisica , Politecnico di Milano, 20133 Milano, ItalyInstitute for Theoretical Physics, Institute of Physics, University of Amsterdam , 1090 GL Amsterdam, The NetherlandsH. H. Wills Physics Laboratory, University of Bristol , BS8 1TL Bristol, United KingdomDipartimento di Fisica , Politecnico di Milano, 20133 Milano, ItalyIFN-CNR, Dipartimento di Fisica , Politecnico di Milano, 20133 Milano, Italy; Dipartimento di Fisica , Politecnico di Milano, 20133 Milano, ItalyDepartment of Physics and Centre for Photonics and Photonic Materials, University of Bath , BA2 7AY Bath, United KingdomIFN-CNR, Dipartimento di Fisica , Politecnico di Milano, 20133 Milano, ItalyPhotoinduced non-thermal phase transitions are new paradigms of exotic non-equilibrium physics of strongly correlated materials. An ultrashort optical pulse can drive the system to a new order through complex microscopic interactions that do not occur in the equilibrium state. Ultrafast spectroscopies are unique tools to reveal the underlying mechanisms of such transitions which lead to transient phases of matter. Yet, their individual specificities often do not provide an exhaustive picture of the physical problem. One effective solution to enhance their performance is the integration of different ultrafast techniques. This provides an opportunity to simultaneously probe physical phenomena from different perspectives while maintaining the same experimental conditions. In this context, we performed complementary experiments by combining time-resolved reflectivity and time and angle-resolved photoemission spectroscopy. We demonstrate the advantage of this combined approach by investigating the complex charge density wave (CDW) phase in 1 T -TiSe _2 . Specifically, we show the key role of lattice degrees of freedom to establish and stabilize the CDW in this material.https://doi.org/10.1088/1367-2630/abe272angle-resolved photoemission spectroscopytime-resolved techniqueultrafast optical spectroscopyphase transitionscharge density wave1T-TiSe2 |
| spellingShingle | H Hedayat C J Sayers A Ceraso J van Wezel S R Clark C Dallera G Cerullo E Da Como E Carpene Investigation of the non-equilibrium state of strongly correlated materials by complementary ultrafast spectroscopy techniques New Journal of Physics angle-resolved photoemission spectroscopy time-resolved technique ultrafast optical spectroscopy phase transitions charge density wave 1T-TiSe2 |
| title | Investigation of the non-equilibrium state of strongly correlated materials by complementary ultrafast spectroscopy techniques |
| title_full | Investigation of the non-equilibrium state of strongly correlated materials by complementary ultrafast spectroscopy techniques |
| title_fullStr | Investigation of the non-equilibrium state of strongly correlated materials by complementary ultrafast spectroscopy techniques |
| title_full_unstemmed | Investigation of the non-equilibrium state of strongly correlated materials by complementary ultrafast spectroscopy techniques |
| title_short | Investigation of the non-equilibrium state of strongly correlated materials by complementary ultrafast spectroscopy techniques |
| title_sort | investigation of the non equilibrium state of strongly correlated materials by complementary ultrafast spectroscopy techniques |
| topic | angle-resolved photoemission spectroscopy time-resolved technique ultrafast optical spectroscopy phase transitions charge density wave 1T-TiSe2 |
| url | https://doi.org/10.1088/1367-2630/abe272 |
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