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

Hamoon Hedayat; Davide  Bugini; Sara Karbassi; Sven Friedemann; Jasper van Wezel; Stephen Clark; Charles Sayers; Enrico Da Como; Giulio Cerullo; Claudia Dallera; Ettore Carpene

doi:10.1051/epjconf/201920504008

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

Hamoon Hedayat, Davide Bugini, Sara Karbassi, Sven Friedemann, Jasper van Wezel, Stephen Clark, Charles Sayers, Enrico Da Como, Giulio Cerullo, Claudia Dallera, Ettore Carpene

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

Abstract

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.

Original language	English
Title of host publication	EPJ Web of Conferences
Publisher	EDP Sciences
Volume	205
Edition	04008
DOIs	https://doi.org/10.1051/epjconf/201920504008
Publication status	Published - 16 Apr 2019

Publication series

Name	EPJ Web of Conferences
Publisher	EDP Sciences
ISSN (Print)	2101-6275

Keywords

Charge density waves
Transition metal dichalcogenides
Phase transitions
Ultrafast spectroscopy
Excitons
Phonons

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10.1051/epjconf/201920504008Licence: CC BY

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Hedayat, H., Bugini, D., Karbassi, S., Friedemann, S., van Wezel, J., Clark, S., Sayers, C., Da Como, E., Cerullo, G., Dallera, C., & Carpene, E. (2019). Charge-density-wave in 1T-TiSe2: exciton-phonon separation by femtosecond valence band dynamics. In EPJ Web of Conferences (04008 ed., Vol. 205). (EPJ Web of Conferences). EDP Sciences. https://doi.org/10.1051/epjconf/201920504008

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

abstract = "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.",

keywords = "Charge density waves, Transition metal dichalcogenides, Phase transitions, Ultrafast spectroscopy, Excitons, Phonons",

author = "Hamoon Hedayat and Davide Bugini and Sara Karbassi and Sven Friedemann and {van Wezel}, Jasper and Stephen Clark and Charles Sayers and {Da Como}, Enrico and Giulio Cerullo and Claudia Dallera and Ettore Carpene",

year = "2019",

month = apr,

day = "16",

doi = "10.1051/epjconf/201920504008",

language = "English",

volume = "205",

series = "EPJ Web of Conferences",

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T1 - Charge-density-wave in 1T-TiSe2: exciton-phonon separation by femtosecond valence band dynamics

AU - Hedayat, Hamoon

AU - Bugini, Davide

AU - Karbassi, Sara

AU - Friedemann, Sven

AU - van Wezel, Jasper

AU - Clark, Stephen

AU - Sayers, Charles

AU - Da Como, Enrico

AU - Cerullo, Giulio

AU - Dallera, Claudia

AU - Carpene, Ettore

PY - 2019/4/16

Y1 - 2019/4/16

N2 - 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.

AB - 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.

KW - Charge density waves

KW - Transition metal dichalcogenides

KW - Phase transitions

KW - Ultrafast spectroscopy

KW - Excitons

KW - Phonons

U2 - 10.1051/epjconf/201920504008

DO - 10.1051/epjconf/201920504008

M3 - Chapter in a published conference proceeding

VL - 205

T3 - EPJ Web of Conferences

BT - EPJ Web of Conferences

PB - EDP Sciences

ER -

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

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