Title:	Spin, time, and angle resolved photoemission spectroscopy on WTe2
Authors:	Fanciulli, Mauro Schusser, Jakub Lee, Min-I El Youbi, Zakariae Heckmann, Olivier Richter, Christine M C Cacho, Cephise Spezzani, Carlo Bresteau, David Hergott, Jean-Francois D'Oliveira, Pascal Tcherbakoff, Olivier Ruchon, Thierry Minár, Jan Hricovini, Karol
Citation:	FANCIULLI, M., SCHUSSER, J., LEE, M., EL YOUBI, Z., HECKMANN, O., RICHTER, CHMC., CACHO, C., SPEZZANI, C., BRESTEAU, D., HERGOTT, J., D'OLIVEIRA, P., TCHERBAKOFF, O., RUCHON, T., MINÁR, J., HRICOVINI, K. Spin, time, and angle resolved photoemission spectroscopy on WTe2. Physical Review Research, 2020, roč. 2, č. 1. ISSN 2643-1564.
Issue Date:	2020
Publisher:	American Physical Society
Document type:	článek article
URI:	http://hdl.handle.net/11025/44928
ISSN:	2643-1564
Keywords in different language:	Electronic structure;Transition-metal dichalcogenide;Weyl semimetal;High-harmonic generation;Korringa-Kohn- Rostoker method;Spin-resolved photoemission spectroscopy;Time & angle-resolved photoemission spectroscopy
Abstract in different language:	We combined a spin resolved photoemission spectrometer with a high-harmonic generation (HHG) laser source in order to perform spin, time, and angle resolved photoemission spectroscopy (STARPES) experiments on the transition metal dichalcogenide bulk WTe2, a possible Weyl type-II semimetal. Measurements at different femtosecond pump-probe delays and comparison with spin resolved one-step photoemission calculations provide insight into the spin polarization of electrons above the Fermi level in the region where Weyl points of WTe2 are expected. We observe a spin accumulation above the Weyl points region, which is consistent with a spin-selective bottleneck effect due to the presence of spin-polarized conelike electronic structure. Our results support the feasibility of STARPES with HHG, which despite being experimentally challenging provides a unique way to study spin dynamics in photoemission.
Rights:	© American Physical Society
Appears in Collections:	Články / Articles Články / Articles (RAM) OBD

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