Charge-density-wave in 1T-TiSe2: exciton-phonon separation by femtosecond valence band dynamics

Hedayat H.; Bugini D.; Karbassi S.; Friedmann S.; van Wezel J.; Clark S. R.; Sayers C.; Da Como E.; Cerullo G.; Dallera C.; Carpene E.

doi:10.1051/epjconf/201920504008

EPJ Web of Conferences (Jan 2019)

Charge-density-wave in 1T-TiSe2: exciton-phonon separation by femtosecond valence band dynamics

Hedayat H.,
Bugini D.,
Karbassi S.,
Friedmann S.,
van Wezel J.,
Clark S. R.,
Sayers C.,
Da Como E.,
Cerullo G.,
Dallera C.,
Carpene E.

Affiliations

Hedayat H.: Dipartimento di Fisica, Politecnico di Milano
Bugini D.: Dipartimento di Fisica, Politecnico di Milano
Karbassi S.: HH Wills Physics Laboratory, University of Bristol
Friedmann S.: HH Wills Physics Laboratory, University of Bristol
van Wezel J.: Institute for Theoretical Physics, Institute of Physics, University of Amsterdam
Clark S. R.: Department of Physics and Centre for Photonics and Photonic Materials, University of Bath
Sayers C.: Department of Physics and Centre for Photonics and Photonic Materials, University of Bath
Da Como E.: Department of Physics and Centre for Photonics and Photonic Materials, University of Bath
Cerullo G.
Dallera C.: Dipartimento di Fisica, Politecnico di Milano
Carpene E.: IFN-CNR, Dipartimento di Fisica, Politecnico di Milano

DOI: https://doi.org/10.1051/epjconf/201920504008
Journal volume & issue: Vol. 205
p. 04008

Abstract

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We investigate the driving mechanism leading to charge-density-wave transition in 1T-TiSe2 single crystals. Our results show that both exciton instability and phonons cooperate to develop the charge ordered phase below 202 K.

Published in EPJ Web of Conferences

ISSN: 2100-014X (Online)
Publisher: EDP Sciences
Country of publisher: France
LCC subjects: Science: Physics
Website: http://www.epj-conferences.org/

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