Recent experimental observations have shown that twisted transition metal dichalcogenides (TMDs) may host correlated phases which develop in presence of a Moiré superlattice [1,2]. Coupling to this long-wavelength periodic potential results in the formation of weakly dispersing sub-bands whose bandwidth is comparable with the magnitude of Coulomb interaction. In this talk, I will present the principal results available in literature from transport measurements on double-gated twisted TMDs devices [1,2]. I will discuss their interpretation in relation to the Moiré-induced modifications of the electronic structure predicted by theory [3,4]. Finally, I will challenge the latter description with the experimental observations obtained with scanning probes (STM, AFM), optics and ARPES [5,6,7].
The slides of this meeting can be downloaded here (in pdf).
References:
[1] A. Ghiotto et al., Nature 597 (2021), 345-349
[2] L. Wang et al., Nat. Mater. 19 (2020), 861–866
[3] Naik M. H. et al., Phys. Rev. Lett. 121 (2018) 266401
[4] M. Angeli and A. H. MacDonald, Proc. Natl. Acad. Sci. USA 118 (2021) 1–5
[5] Zhang, Z. et al., Nat. Phys. 16 (2020) 1093–1096
[6] Li, E. et al., Nat. Commun 12 (2021) 5601
[7] Lin, K.-Q. et al., Adv. Mater. 33 (2021) 2008333
Location: Stueckelberg, Ecole de Physique
Time: Friday 11 March, 12:00 for pizza, 12:30 start discussion
Please register before Thursday 10 March, 19:00, for pizza on this doodle: https://doodle.com/meeting/participate/id/zbq8Bz0a