Université de Neuchâtel

Spin–orbit splitting in the valence bands of 1T-TaS2 and 1T-TaSe2

Clerc, F. ; Bovet, M. ; Berger, H. ; Despont, Laurent ; Koitzsch, C. ; Gallus, O ; Patthey, L ; Shi, M. ; Krempasky, J. ; Garnier, Michael Bernard Gunnar ; Aebi, Philipp

In: Journal of Physics : Condensed Matter, 2004, vol. 16, p. 3271-3278

We perform angle-resolved photoemission spectroscopy on 1T-TaS2 and 1T-TaSe2 using synchrotron radiation. We observe a characteristic splitting of the chalcogen p-derived valence bands along high symmetry directions. Density functional theory calculation and group theory strongly suggest that this splitting is due to spin–orbit interaction along one...