Correlation between stoichiometry and (spin-resolved) band structure of manganese telluride monolayers through XPS and (sr-)ARPES

Transition metal dichalcogenide monolayers are of considerable interest for fundamental research as they present strongly electron-correlated phases, including charge density waves and unusual magnetic phenomena. The proposed study aims to characterize MnnTen+1 monlayers with distinct stoichiometric phases, in order understand how the structural changes induced by abrupt changes in stoichiometry impact in their electronic structure and magnetic properties. To this end, LOREAS’ capability to provide monochromatic photons across a wide energy spectrum will allow simultaneous characterization of the core levels and valence band, which is essential for unequivocal correlation between stoichiometry and electronic properties. Furthermore, the state-of-the-art VLEED detector will enable in-situ probing the band structure of each MnnTen+1 phase with spin-resolution, thereby providing valuable insights into their magnetic nature.

过渡金属二硫族化合物单层（Transition metal dichalcogenide monolayers）因呈现出包括电荷密度波与反常磁现象在内的强电子关联相，在基础研究领域具有重要研究价值并广受关注。本研究旨在对具有不同化学计量比相的MnnTen+1单层开展表征工作，以探明化学计量比突变诱导的结构变化如何对其电子结构与磁学性质造成影响。为此，LOREAS具备在宽能谱范围内提供单色光子的能力，可同时完成芯能级与价带的表征，这对于明确建立化学计量比与电子性质之间的关联至关重要。此外，采用最先进的VLEED探测器，能够以自旋分辨模式原位探测每种MnnTen+1相的能带结构，进而为揭示其磁学本质提供极具价值的研究见解。