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VOLUME 56 (1992) | ISSUE 9 | PAGE 470
The spin-wave spectrum of s=1/2 triangular lattice Heisenberg antiferromagnet
The ground state and spin excitations of a Heisenberg antiferromagnet on a triangular lattice with nearestand next-nearest-neighbor interactions are investigated. Ground state has long-range order and becomes unstable near /2/·Λ=2/15. The possibility of spin liquid state is discussed.