most citedJordan-Wigner approach to the frustrated spin one-half XXZ chain

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Jordan-Wigner fermions and the spin-1/2 anisotropic XY model on a square lattice

Oleg Derzhko, Johannes Richter, Taras Verkholyak

Using the two-dimensional Jordan-Wigner fermionization we calculate the thermodynamic quantities of the (spatially anisotropic) square-lattice spin-1/2 anisotropic XY (XZ) model. W…