Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2002-10-18
Phys. Rev. B66, 054419 (2002)
Physics
Condensed Matter
Strongly Correlated Electrons
Revtex, 7 figures
Scientific paper
10.1103/PhysRevB.66.054419
The field-induced transition in one-dimensional S=1 Heisenberg antiferromagnet with single-ion anisotropy in the presence of a transverse magnetic field is obtained on the basis of the Schwinger boson mean-field theory. The behaviors of the specific heat and susceptibility as functions of temperature as well as the applied transverse field are explored, which are found to be different from the results obtained under a longitudinal field. The anomalies of the specific heat at low temperatures, which might be an indicative of a field-induced transition from a Luttinger liquid phase to an ordered phase, are explicitly uncovered under the transverse field. A schematic phase diagram is proposed. The theoretical results are compared with experimental observations.
Chu Junhao
Gao Song
Su Gang
Xing Huaizhong
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