Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 87: 2D Materials IV: Charge Density Waves and Electronic Properties
O 87.6: Vortrag
Donnerstag, 4. April 2019, 16:15–16:30, H25
Electronic structure and charge order of monolayer VSe2 — Jiagui Feng1, •Deepnarayan Biswas1, Akhil Rajan1, Matthew D. Watson1, Federico Mazzola1, Oliver J. Clarke1, Kaycee Underwood1, Igor Marković1, Martin McLaren1, Andrew Hunter1, David M. Burn2, Liam B. Duffy3, Sourabh Barua4, Geetha Balakrishnan4, François Bertran5, Patrick Le Fèvre5, Timur K. Kim2, Gerrit van der Laan2, Thorsten Hesjedal3, Peter Wahl1, and Phil D. C. King1 — 1University of St. Andrews, UK — 2Diamond Light Source, UK — 3University of Oxford, UK — 4University of Warwick, UK — 5Synchrotron Soleil, France
The electronic states and phases of many monolayer (ML) transition metal dichalcogenides (TMDs) found to be different from its bulk properties and this evolution of electronic properties with thickness in TMDs are still a key open question. Here we show the results of our study on molecular beam epitaxy (MBE) grown ML VSe2 film on bi-layer graphene/SiC. We have measured the detail band dispersion of this material using angle resolved photoelectron spectroscopy (ARPES). The low energy electron diffraction (LEED), along with the ARPES data show an enhanced charge density wave order compare to its bulk form. Our density functional theory (DFT) calculation and X-ray magnetic circular dichroism (XMCD) measurements suggests no magnetic ordering in ML VSe2.