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 proceedingConference 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 languageEnglish
Title of host publicationAdvances in Ultrafast Condensed Phase Physics II
EditorsStefan Haacke, Sangeeta Sharma, Vladislav Yakovlev
PublisherSPIE
ISBN (Electronic)9781510634640
DOIs
Publication statusPublished - 30 Apr 2020
EventAdvances in Ultrafast Condensed Phase Physics II 2020 - None, France
Duration: 6 Apr 202010 Apr 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11346
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceAdvances in Ultrafast Condensed Phase Physics II 2020
CountryFrance
CityNone
Period6/04/2010/04/20

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

Cite this

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