Fermionic description of spin-gap states of antiferromagnetic Heisenberg ladders in a magnetic field
Hori, Hiromitsu · Yamamoto, Shoji
Original · EN
Employing the Jordan-Wigner transformation on a unique path and then making a mean-field treatment of the fermionic Hamiltonian, we semiquantitatively describe the spin-gap states of Heisenberg ladders in a field. The appearance of magnetization plateaux is clarified as a function of the number of legs.
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