Moiré materials, designed by stacking 2D materials with a controlled misalignment, were recently shown to host a panel of many-body ground states. As an example, twisted bilayer graphene (TBG), can be tuned into a superconductor , correlated insulator , magnet or topologically nontrivial phase  by in-situ electrostatic gating. In this seminar, we will show that the metallic regime in the direct vicinity of these correlated phases displays a non-conventional ‘strange-metal’ behavior . This state echoes that of other families of strongly correlated materials,
such as the cuprates, and has been escaping theoretical understanding for several decades. On the contrary, away from these correlated states, TBG reverts to the canonical Fermi liquid behavior.
These observations shed light on the underlying microscopic mechanisms that drive the metallic ground state, and they establish moiré materials as highly tunable platforms for investigating strange-metallicity in superconductors.
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