Series expansion for the J1-J2 Heisenberg antiferromagnet on a square lattice.
نویسندگان
چکیده
We have developed series expansions about the Ising limit for the ground state energy, magnetization, susceptibility, and energy gap of the frustrated J1-J2 antiferromagnet. We find that the Néel order vanishes at J2 /J1.0.4 and collinear order sets in around J2 /J1.0.6, in broad agreement with other recent work. We also explore the nature of the phase diagram for the spin-anisotropic case. @S0163-1829~96!07730-2#
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عنوان ژورنال:
- Physical review. B, Condensed matter
دوره 54 5 شماره
صفحات -
تاریخ انتشار 1996