Tunable stripe order and weak superconductivity in the Moiré Hubbard model
Alexander Wietek, Jie Wang, Jiawei Zang, Jennifer Cano, Antoine Georges, Andrew Millis
DOI 10.1103/PhysRevResearch.4.043048 · Physical Review Research
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Abstract
The moiré Hubbard model describes correlations in certain homobilayer twisted transition metal dichalcogenides. Using exact diagonalization and density matrix renormalization group methods, we find magnetic Mott insulating and metallic phases which, upon doping, exhibit intertwined charge and spin ordering and, in some regimes, pair binding of holes. The phases are highly tunable via an interlayer potential difference. Remarkably, the hole-binding energy is found to be highly tunable, revealing an experimentally accessible regime where holes become attractive. In this attractive regime, we study the superconducting correlation function and point out the possibility of weak superconductivity.
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