Ordering due to quantum fluctuations in Sr2Cu3O4Cl2

Y. J. Kim; A. Aharony; R. J. Birgeneau; F. C. Chou; O. Entin-Wohlman; R. W. Erwin; M. Greven; A. B. Harris; M. A. Kastner; I. Ya Korenblit; Y. S. Lee; G. Shirane

doi:10.1103/PhysRevLett.83.852

Ordering due to quantum fluctuations in Sr₂Cu₃O₄C_l2

Y. J. Kim, A. Aharony, R. J. Birgeneau, F. C. Chou, O. Entin-Wohlman, R. W. Erwin, M. Greven, A. B. Harris, M. A. Kastner, I. Ya Korenblit, Y. S. Lee, G. Shirane

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

65 Scopus citations

Abstract

Sr₂Cu₃O₄C_l2 has Cu_I and Cu_II subsystems, forming interpenetrating S=1/2 square lattice Heisenberg antiferromagnets. The classical ground state is degenerate, due to frustration of the intersubsystem interactions. Magnetic neutron scattering experiments show that quantum fluctuations cause a two dimensional Ising ordering of the Cu_II’s, lifting the degeneracy, and a dramatic increase of the Cu_I out-of-plane spin-wave gap, unique for order out of disorder. The spin-wave energies are quantitatively predicted by calculations which include quantum fluctuations.

Original language	English (US)
Pages (from-to)	852-855
Number of pages	4
Journal	Physical review letters
Volume	83
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.83.852
State	Published - Jan 1 1999

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abstract = "Sr2Cu3O4Cl2 has CuI and CuII subsystems, forming interpenetrating S=1/2 square lattice Heisenberg antiferromagnets. The classical ground state is degenerate, due to frustration of the intersubsystem interactions. Magnetic neutron scattering experiments show that quantum fluctuations cause a two dimensional Ising ordering of the CuII{\textquoteright}s, lifting the degeneracy, and a dramatic increase of the CuI out-of-plane spin-wave gap, unique for order out of disorder. The spin-wave energies are quantitatively predicted by calculations which include quantum fluctuations.",

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AU - Kim, Y. J.

AU - Aharony, A.

AU - Birgeneau, R. J.

AU - Chou, F. C.

AU - Entin-Wohlman, O.

AU - Erwin, R. W.

AU - Greven, M.

AU - Harris, A. B.

AU - Kastner, M. A.

AU - Korenblit, I. Ya

AU - Lee, Y. S.

AU - Shirane, G.

PY - 1999/1/1

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AB - Sr2Cu3O4Cl2 has CuI and CuII subsystems, forming interpenetrating S=1/2 square lattice Heisenberg antiferromagnets. The classical ground state is degenerate, due to frustration of the intersubsystem interactions. Magnetic neutron scattering experiments show that quantum fluctuations cause a two dimensional Ising ordering of the CuII’s, lifting the degeneracy, and a dramatic increase of the CuI out-of-plane spin-wave gap, unique for order out of disorder. The spin-wave energies are quantitatively predicted by calculations which include quantum fluctuations.

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