Quantum Fluctuation-induced Phase Transition in S=1/2 XY-like Heisenberg Antiferromagnets on the Triangular Lattice
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- Yoshikawa Shin-ichiro
- Department of Applied Physics, The University of Tokyo
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- Okunishi Kouichi
- Department of Physics, Niigata University
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- Senda Makoto
- Pension Business Planning Department, UFJ Trust Bank Limited
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- Miyashita Seiji
- Department of Applied Physics, The University of Tokyo
Bibliographic Information
- Other Title
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- Quantum Fluctuation-induced Phase Transition in<i>S</i>=1/2 XY-like Heisenberg Antiferromagnets on the Triangular Lattice
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Abstract
The selection of the ground state among nearly degenerate states due to quantum fluctuations is studied for the S=1⁄2 XY-like Heisenberg antiferromagnets on the triangular lattice in the magnetic field applied along the hard axis, which was first pointed out by Nikuni and Shiba. We find that the selected ground state sensitively depends on the degree of the anisotropy and the magnitude of the magnetic field. This dependence is similar to that in the corresponding classical model at finite temperatures where various types of field induced phases appear due to the entropy effect. It is also found that the similarities of the selected states in the classical and quantum models are not the case in a two-leg ladder lattice, although the lattice consists of triangles locally and the ground state of this lattice in the classical case is the same as that of the triangular lattice.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 73 (7), 1798-1804, 2004
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390282679164044544
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- NII Article ID
- 110001954896
- 130004538850
- 210000104910
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- NII Book ID
- AA00704814
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- BIBCODE
- 2004JPSJ...73.1798Y
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 7004302
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed