Spin, time, and angle resolved photoemission spectroscopy on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>WTe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>
Mauro Fanciulli, Jakub Schusser, Min-I Lee, Zakariae El Youbi, Olivier Heckmann, Maria Christine Richter, Cephise Cacho, Carlo Spezzani, David Bresteau, Jean-François Hergott, Pascal D'Oliveira, Olivier Tcherbakoff, Thierry Ruchon, Jan Minár, Karol Hricovini
Abstract
The authors present spin, time, and angle resolved photoemission spectroscopy measurements on the transition metal dichalcogenide bulk WTe2. The results show a response of the spin polarization in the unoccupied states above the proposed Weyl type-II points region. The observed spin accumulation after the pump pulse is interpreted as a spin-selective bottleneck effect, consistent with the presence of spin polarized cone-like electronic structure and independent on the topological classification of WTe2.