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Proceedings Paper

Accessing and probing of the photo-induced hidden state in 1T-TaS2 with time- and angle-resolved photoemission spectroscopy
Author(s): Isabella Avigo; Igor Vaskivskyi; Manuel Ligges; Matthias Kalläne; Kai Rossnagel; Ljupka Stojchevska; Dragan Mihailović; Uwe Bovensiepen
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Paper Abstract

A previous time-resolved optical study reported on a metastable hidden electronic state in 1T-TaS2, which is only accessible upon photoexcitation and created under non-equilibrium conditions [1]. The properties of such a state are distinct from those of any other state in the equilibrium phase diagram and it is possible to revert to the thermodynamic initial state either by illuminating with picosecond laser pulses or by applying other thermal erase procedures. In this work we show photoinduced switching to a metastable hidden state on the same material, and probe it by means of both static and time-resolved photoemission spectroscopy, thus having direct access to the electronic structure of the system. From our experimental findings and comparison with other studies, we conclude that we obtain partial switching, leading to a hidden state with persisting insulating nature but significant modifications in the electronic structure and CDW ordering.

Paper Details

Date Published: 26 September 2016
PDF: 8 pages
Proc. SPIE 9931, Spintronics IX, 99313V (26 September 2016); doi: 10.1117/12.2239258
Show Author Affiliations
Isabella Avigo, Univ. Duisburg-Essen (Germany)
Igor Vaskivskyi, Institut Jožef Stefan (Slovenia)
Manuel Ligges, Univ. Duisburg-Essen (Germany)
Matthias Kalläne, Christian-Albrechts-Univ. zu Kiel (Germany)
Kai Rossnagel, Christian-Albrechts-Univ. zu Kiel (Germany)
Ljupka Stojchevska, Univ. Duisburg-Essen (Germany)
Institut Jožef Stefan (Slovenia)
Dragan Mihailović, Institut Jožef Stefan (Slovenia)
Uwe Bovensiepen, Univ. Duisburg-Essen (Germany)

Published in SPIE Proceedings Vol. 9931:
Spintronics IX
Henri-Jean Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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