Phys. Rev. Lett. 66, 100–103 (1991)Quantum spin nematics: Moment-free magnetismReceived 29 March 1990; published in the issue dated 7 January 1991 Treating antiferromagnetism as a spin superfluid, we discuss the possibility of moment-free magnetism. Specifically we show that large quantum fluctuations induce an anisotropy in Heisenberg spiral structures, driving a biaxial-uniaxial transition to a spin nematic; this state is characterized by tensor spin order and a gapless Goldstone mode of spin-pair excitations. Experimental signatures and realizations of this phenomena are suggested. © 1991 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.66.100
DOI:
10.1103/PhysRevLett.66.100
PACS:
75.10.Jm, 74.65.+n, 75.30.-m, 75.50.Ee
See AlsoComment: H. A. Ceccatto, C. J. Gazza, and A. E. Trumper, Comment on ‘‘Quantum spin nematics: Moment-free magnetism’’, Phys. Rev. Lett. 72, 1943 (1994). Reply: P. Coleman and P. Chandra, Coleman and Chandra reply, Phys. Rev. Lett. 72, 1944 (1994). |
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