Skyrmions and Quantum Hall Ferromagnets in Improved Composite-Boson Theory.
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- Ezawa Zyun F.
- Department of Physics, Tohoku University, Sendai 980–8578
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- Sasaki Kenichi
- Department of Physics, Tohoku University, Sendai 980–8578
Bibliographic Information
- Other Title
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- Skymions and Quantum Hall Ferromagnets in Improved Composite-Boson Theory
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Abstract
An improved composite-boson theory of quantum Hall ferromagnets is proposed.It is tightly related with the microscopic wave-function theory. Thecharacteristic feature is that the field operator describes solely thephysical degrees of freedom representing the deviation from the groundstate.It presents a powerful tool to analyze excited states within the lowest Landau level.Excitations include a Goldstone mode and nonlocal topological solitons.Solitons are vortices and Skyrmions carrying the U(1) and SU(2) topologicalcharges, respectively. Their classical configurations are derived fromtheirmicroscopic wave functions. The activation energy of one Skyrmion isestimated, which explains experimental data remarkably well.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 68 (2), 576-585, 1999
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390282679158268544
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- NII Article ID
- 110001978692
- 210000102089
- 130004537034
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- NII Book ID
- AA00704814
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- BIBCODE
- 1999JPSJ...68..576E
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 4664542
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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