Novel magnetic relaxation in single-crystal Tl2Ca1Ba2Cu2O8 superconductors
Magnetic relaxation in single-crystal Tl2Ca1Ba2Cu2O8 superconductors is reported. Typical logarithmic flux creep has been observed at low temperatures. At high temperatures and fields, different flux ...
Magnetic relaxation in single-crystal Tl2Ca1Ba2Cu2O8 superconductors is reported. Typical logarithmic flux creep has been observed at low temperatures. At high temperatures and fields, different flux ...
Generalized flux states and the quantum Hall effect (abstract)
We investigate certain generalized flux phases arising in a mean-field approach to the t-J model. First we establish that the energy of noninteracting electrons moving in a uniform magnetic field has ...
We investigate certain generalized flux phases arising in a mean-field approach to the t-J model. First we establish that the energy of noninteracting electrons moving in a uniform magnetic field has ...
Ordering by quantum fluctuations in a strongly frustrated Heisenberg antiferromagnet
J. Appl. Phys. 69, 5200 (1991); doi:10.1063/1.348098
Issue Date: 15 April 1991
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The nature of the ordering of a quantum spin-1/2 Heisenberg antiferromagnet is considered in the presence of the strong lattice frustration associated with the pyrochlore lattice. A field theory indicates that quantum fluctuations lead to a state having dimerization that has long-range static correlations not in 
S
but rather in S(r)·S(r+
). A sublattice ordering is found that is consistent with results obtained using degenerate perturbation theory to analyze the ground-state manifold.
Journal of Applied Physics is copyrighted by The American Institute of Physics.
S but rather in S(r)·S(r+). A sublattice ordering is found that is consistent with results obtained using degenerate perturbation theory to analyze the ground-state manifold.
Journal of Applied Physics is copyrighted by The American Institute of Physics.
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KEYWORDS and PACS
- 75.10.Jm
Magnetic properties and materials General theory and models of magnetic ordering Quantized spin models - 75.25.+z
Magnetic properties and materials Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.) - 75.50.Ee
Magnetic properties and materials Studies of specific magnetic materials Antiferromagnetics - YEAR: 1990-91
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0021-8979 (print)
1089-7550 (online)
AIP
REFERENCES (8)
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- For a recent treatment which uses a formalism similar to ours, see G. Baskaran, Phys. Rev. Lett. 63, 2524 (1989).
- V. Elser, Phys. Rev. Lett. 62, 2405 (1989).
- J. N. Reimers, J. E. Greedan, R. E. Kremer, E. Gmelin, and M. A. Subramanian, Phys. Rev. B 43, 3387 (1991).
- J. N. Reimers, A. J. Berlinsky, and A.-C. Shi, Phys. Rev. B 43, 865 (1991).
- P. W. Anderson,
Phys. Rev. 102, 1008 (1956 ). - J. A. Hertz, Phys. Rev. 14, 1165 (1976).
- The term
u,v
u(0)2v(0)2 does give rise to an effective quadratic coupling u,vu(0)v(0)b2, which couples symmetric fluctuations on adjacent tetrahedra. These symmetric fluctuations are orthogonal to critical fluctuations such as those in Eq. (8). - X. G. Wen, F. Wilczek, and A. Zee, Phys. Rev. B 39, 11 413 (1989).
