Fermionic description of spin-gap states of antiferromagnetic Heisenberg
  ladders in a magnetic field

Azuma M.; Azzouz M.; Bednorz J. G.; Cabra D. C.; Cabra D. C.; Cabra D. C.; Dagotto E.; Dagotto E.; Dai X.; Haldane F. D. M.; Hiroi Z.; Johnston D. C.; Oshikawa M.; Tandon K.; Totsuka K.; White S. R.

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Fermionic description of spin-gap states of antiferromagnetic Heisenberg ladders in a magnetic field

Authors: Azuma M.
Azzouz M.
Bednorz J. G.
Cabra D. C.
Cabra D. C.
Cabra D. C.
Dagotto E.
Dagotto E.
Dai X.
Haldane F. D. M.
Hiroi Z.
Johnston D. C.
Oshikawa M.
Tandon K.
Totsuka K.
White S. R.
Publication date: 27 June 2002
Publisher: 'Japan Society of Applied Physics'
Doi

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.Comment: 2 pages, 3 figures embedded, J. Phys. Soc. Jpn. Vol. 71, No. 6, 1607 (2002

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