PhD position: Circuit quantum electrodynamics to probe strongly interacting electronic phases in atomically thin nanoelectronic devices (P2601)

Atomically thin layers of various materials can be combined into novel artificial materials, with graphene structures being prominent examples. When two or more layers are combined at a certain twist angle, a moiré superlattice can emerge, leading to various emergent electronic phases such as superconductivity, ferromagnetism, or Mott insulators, driven by electron interactions. Similar phases have been discovered in twisted bilayer structures of atomically thin semiconductors, especially in transition metal dichalcogenides (TMDCs), mostly investigated by optical spectroscopy and low-frequency transport experiments.

• Exploit circuit quantum electrodynamics (cQED) techniques based on high-impedance superconducting resonators in the GHz regime to probe electron-electron interactions in layered 2D materials.
• Directly access material properties such as quantum capacitance and kinetic inductance of superconductors.
• Discover and explore exotic relations in complex interacting systems.
• Aim to achieve the strong coupling regime, where quantum states hybridize with photonic states, and probe these with low-frequency transport and pump-probe experiments adapted from qubit experiments.
• Engage in modern nanofabrication, cutting-edge material science, fundamental physics, and quantum technology topics.