Asia Pacific Physics Week 2023 (APPW2023)

Wednesday, Nov. 8, 2023 

2:40 PM - 3:20 PM  Plenary Talk  Arindam Ghosh (Indian Institute of Science, Bangalore) 

Engineering and probing new phases in twisted van der Waals heterostructures containing transition metal dichalcogenides layers

Arindam Ghosh

Department of Physics, Indian Institute of Science, Bangalore 560012, Karnataka, India.

Twisted van der Waals heterostructures have enriched the phase space of two-dimensional (2D) materials by introducing a new knob to engineer Coulomb interaction, structural symmetry breaking, to electron-phonon interaction, among others. Partnering different genres of 2D materials provides further flexibility in introducing spin-orbit interaction, topological properties etc. The resulting structures are not just ideal platforms for new fundamental discoveries, but also for designing novel device architectures. In this talk, I shall cover a range of such devices, where partnering of twisted bilayers of graphene or transition metal dichalcogenides leads to new correlated phases at unconventional band filling, as well as unexpected device properties when incorporated in field effect devices. The novelty of these properties is probed with multiple experimental techniques, such as thermoelectricity and electrical transport.

[1] Ghawri et al. Nat Comm (2022)

[2] Bhowmik et al. Nat Phys. (2022)

[3] Bhowmik et al. Nat comm (2023)

[4] Debnath et al. (under review)