Investigation of the non-equilibrium state of strongly correlated materials by complementary ultrafast spectroscopy techniques

Hamoon Hedayat, Charles Sayers, Arianna Ceraso, Jasper van Wezel, Stephen Clark, Claudia Dallera, Giulio Cerullo, Enrico Da Como, Ettore Carpene

Research output: Contribution to journalArticlepeer-review

6 Citations (SciVal)

Abstract

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 1T-TiSe 2. Specifically, we show the key role of lattice degrees of freedom to establish and stabilize the CDW in this material.

Original languageEnglish
Article number033025
JournalNew Journal of Physics
Volume23
Issue number3
Early online date2 Feb 2021
DOIs
Publication statusPublished - 15 Mar 2021

Bibliographical note

Funding Information:
Original content from this work may be used under the terms of the . Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. VIDI grant financed by the Netherlands Organization for Scientific Research (NWO) EPSRC Centre for Doctoral Training in Condensed Matter Physics (CDT-CMP) EP/L015544/1 Horizon 2020 Framework Program https://doi.org/10.13039/100010661 654148 881603 PRIN 2017 2017BZPKSZ 002 EPSRC EP/P025110/2 yes � 2021 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft Creative Commons Attribution 4.0 licence

Funding Information:
Sara Karbassi and Sven Friedemann are gratefully acknowledged for the electrical transport measurements. GC, EC and HH acknowledge funding from the European Union Horizon 2020 Program under Grant Agreement No. 881603 Graphene Core 3, and from Italian grant PRIN 2017-2017BZPKSZ002. CJS acknowledges funding and support from the EPSRC Centre for Doctoral Training in Condensed Matter Physics (CDT-CMP), Grant No. EP/L015544/1. JvW acknowledges support from a VIDI grant financed by the Netherlands Organization for Scientific Research (NWO). EDC acknowledges support from Horizon 2020 (Grant No. 654148, Laserlab-Europe). SRC acknowledges support from EPSRC under Grant No. EP/P025110/2.

Publisher Copyright:
© 2021 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft

Keywords

  • 1T-TiSe
  • Angle-resolved photoemission spectroscopy
  • Charge density wave
  • Phase transitions
  • Time-resolved technique
  • Ultrafast optical spectroscopy

ASJC Scopus subject areas

  • General Physics and Astronomy

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