Fermionic description of spin-gap states of antiferromagnetic Heisenberg ladders in a magnetic field
arXiv:cond-mat/0206554 · doi:10.1143/JPSJ.71.1607
Abstract
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.
2 pages, 3 figures embedded, J. Phys. Soc. Jpn. Vol. 71, No. 6, 1607 (2002)