Regensburg 2025 – scientific programme
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MA: Fachverband Magnetismus
MA 36: Focus Session: Ising Superconductivity in Monolayer Transition Metal Dichalcogenides (joint session TT/HL/MA)
MA 36.1: Topical Talk
Thursday, March 20, 2025, 09:30–10:00, H36
Evidence of Unconventional Superconductivity in Monolayer and Bulk van der Waals Material TaS2 — •Somesh Chandra Ganguli1, Viliam Vano1,2, Yuxiao Ding1, Maryam Khosravian1, Jose Lado1, and Peter Liljeroth1 — 1Department of Applied Physics, Aalto University FI-00076 Aalto, Finland — 2Joseph Henry Laboratories and Department of Physics, Princeton University, Princeton, NJ, USA
Unconventional superconductors are at the forefront of modern quantum materials’ research. Even though unconventional superconductivity has been discovered in a large number of bulk systems, intrinsic unconventional superconductivity in the monolayer limit has remained elusive.
In our work, we demonstrate the evidence of nodal f-wave superconductivity in monolayer 1H-TaS2. We also observe the emergence of many-body excitations potentially associated to its unconventional pairing mechanism. Furthermore, the nodal f-wave superconducting state in the pristine monolayer 1H-TaS2 is driven to a conventional gapped s-wave state by the inclusion of non-magnetic disorder. I will also briefly describe our recent results on bulk layered superconductor 6R-TaS2 where alternating metallic and Mott insulating layers gives rise to unconventional superconductivity.
Our results demonstrate the emergence of unconventional superconductivity in van der Waals (vdW) materials and therefore opens possibilities to create designer unconventional superconductivity in vdW heterostructures.
Keywords: Nodal superconductor; Hidden order; Mott insulator