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Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 70: Correlated Electrons: Charge Order

TT 70.3: Vortrag

Freitag, 20. März 2020, 10:00–10:15, HSZ 103

The nature of the charge density wave in TiSe2 — •Adam Kłosiński1, Jans Henke2, Krzysztof Wohlfeld1, and Jasper van Wezel21University of Warsaw, Krakowskie Przedmieście 26/28, 00-927, Warsaw, Poland — 2University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands

Recently a charge density wave (CDW) was observed in a momentum resolved EELS (M-EELS) experiment on TiSe2. According to the model proposed for TiSe2 the CDW present in the system is transversal [1]. However, it is known that M-EELS is not sensitive to transverse CDWs [2]. Here we calculate the M-EELS response of TiSe2 using a minimal model. We show that one can observe not only longitudinal but also transversal components of a CDW, for M-EELS is a surface-sensitive technique.

[1] F. J. Di Salve et al., Phys. Rev. B 14, 4321 (1976)

[2] S. Vig et al., SciPost Phys. 3, 026 (2017)

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