Combined ultrafast spectroscopy techniques discloses the microscopic electron lattice interplay behind charge density waves

H. Hedayat; A. Ceraso; C. Sayers; S. Dal Conte; J. Van Wezel; S. R. Clark; E. Da Como; G. Cerullo; C. Dallera; E. Carpene

doi:10.1117/12.2556677

Combined ultrafast spectroscopy techniques discloses the microscopic electron lattice interplay behind charge density waves

H. Hedayat, A. Ceraso, C. Sayers, S. Dal Conte, J. Van Wezel, S. R. Clark, E. Da Como, G. Cerullo, C. Dallera, E. Carpene

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Understanding the complex interactions associated with charge, spin, lattice and orbital degrees of freedom is fundamental for emerging applications of quantum materials. In this context, ultrafast optical spectroscopy systems are promising tools to study the origin of complex orders. Here, an intense optical pulse brings the system out-of-equilibrium, providing an excellent opportunity to distinguish the dynamics of each subsystem. Using ultrafast techniques, we investigated charge density wave (CDW) behavior in transition-metal dichalcogenides (TMDs) after photo-excitation and during the relaxation time. To unravel the mechanisms underlying the correlations in CDW systems, we combined time resolved re ectivity (TRR) and time and angle resolved photoemission spectroscopy (TARPES). Our approach provides clear evidence of the phononic contribution to CDW phenomena in 1T-TiSe₂.

Original language	English
Title of host publication	Advances in Ultrafast Condensed Phase Physics II
Editors	Stefan Haacke, Sangeeta Sharma, Vladislav Yakovlev
Publisher	SPIE
ISBN (Electronic)	9781510634640
DOIs	https://doi.org/10.1117/12.2556677
Publication status	Published - 30 Apr 2020
Event	Advances in Ultrafast Condensed Phase Physics II 2020 - None, France Duration: 6 Apr 2020 → 10 Apr 2020

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	11346
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Advances in Ultrafast Condensed Phase Physics II 2020
Country	France
City	None
Period	6/04/20 → 10/04/20

Keywords

Charge density waves
Correlated electron systems
Transition metal dichalcogenides
Photoemission spectroscopy
Ultrafast spectroscopy
Phase transitions
Electronic structure

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

10.1117/12.2556677

Link to publication in Scopus

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Hedayat, H., Ceraso, A., Sayers, C., Dal Conte, S., Van Wezel, J., Clark, S. R., Da Como, E., Cerullo, G., Dallera, C., & Carpene, E. (2020). Combined ultrafast spectroscopy techniques discloses the microscopic electron lattice interplay behind charge density waves. In S. Haacke, S. Sharma, & V. Yakovlev (Eds.), Advances in Ultrafast Condensed Phase Physics II [113460D] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11346). SPIE. https://doi.org/10.1117/12.2556677

Combined ultrafast spectroscopy techniques discloses the microscopic electron lattice interplay behind charge density waves. / Hedayat, H.; Ceraso, A.; Sayers, C.; Dal Conte, S.; Van Wezel, J.; Clark, S. R.; Da Como, E.; Cerullo, G.; Dallera, C.; Carpene, E.

Advances in Ultrafast Condensed Phase Physics II. ed. / Stefan Haacke; Sangeeta Sharma; Vladislav Yakovlev. SPIE, 2020. 113460D (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11346).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Hedayat, H, Ceraso, A, Sayers, C, Dal Conte, S, Van Wezel, J, Clark, SR, Da Como, E, Cerullo, G, Dallera, C & Carpene, E 2020, Combined ultrafast spectroscopy techniques discloses the microscopic electron lattice interplay behind charge density waves. in S Haacke, S Sharma & V Yakovlev (eds), Advances in Ultrafast Condensed Phase Physics II., 113460D, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11346, SPIE, Advances in Ultrafast Condensed Phase Physics II 2020, None, France, 6/04/20. https://doi.org/10.1117/12.2556677

Hedayat H, Ceraso A, Sayers C, Dal Conte S, Van Wezel J, Clark SR et al. Combined ultrafast spectroscopy techniques discloses the microscopic electron lattice interplay behind charge density waves. In Haacke S, Sharma S, Yakovlev V, editors, Advances in Ultrafast Condensed Phase Physics II. SPIE. 2020. 113460D. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.2556677

Hedayat, H. ; Ceraso, A. ; Sayers, C. ; Dal Conte, S. ; Van Wezel, J. ; Clark, S. R. ; Da Como, E. ; Cerullo, G. ; Dallera, C. ; Carpene, E. / Combined ultrafast spectroscopy techniques discloses the microscopic electron lattice interplay behind charge density waves. Advances in Ultrafast Condensed Phase Physics II. editor / Stefan Haacke ; Sangeeta Sharma ; Vladislav Yakovlev. SPIE, 2020. (Proceedings of SPIE - The International Society for Optical Engineering).

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AU - Ceraso, A.

AU - Sayers, C.

AU - Dal Conte, S.

AU - Van Wezel, J.

AU - Clark, S. R.

AU - Da Como, E.

AU - Cerullo, G.

AU - Dallera, C.

AU - Carpene, E.

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AB - Understanding the complex interactions associated with charge, spin, lattice and orbital degrees of freedom is fundamental for emerging applications of quantum materials. In this context, ultrafast optical spectroscopy systems are promising tools to study the origin of complex orders. Here, an intense optical pulse brings the system out-of-equilibrium, providing an excellent opportunity to distinguish the dynamics of each subsystem. Using ultrafast techniques, we investigated charge density wave (CDW) behavior in transition-metal dichalcogenides (TMDs) after photo-excitation and during the relaxation time. To unravel the mechanisms underlying the correlations in CDW systems, we combined time resolved re ectivity (TRR) and time and angle resolved photoemission spectroscopy (TARPES). Our approach provides clear evidence of the phononic contribution to CDW phenomena in 1T-TiSe2.

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KW - Correlated electron systems

KW - Transition metal dichalcogenides

KW - Photoemission spectroscopy

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