Electric field enhances ring exchange relative to Heisenberg interactions, shifting the CSL phase boundary to smaller t/U in the ring exchange model on the triangular lattice.
For the two site contribution, the operator string T −T 0T 0T + first creates a doubly occupied site, meaning one of the two sites is empty and the other is full
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Electric field control of a quantum spin liquid in weak Mott insulators
Electric field enhances ring exchange relative to Heisenberg interactions, shifting the CSL phase boundary to smaller t/U in the ring exchange model on the triangular lattice.