Novel massive ground states of spin chains in a magnetic field |
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Authors: | K Totsuka |
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Institution: | (1) The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama, 351-01, Japan, JP |
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Abstract: | Novel massive quantum states appearing in spin chains under a strong magnetic field are discussed. These states lead to plateaus in magnetization
curves. When the systems are axially symmetric and the field is applied parallel to the symmetry-axis, the phenomena are analogous
to metal-insulator transitions. Striking features of the plateau phenomena - exactness and rationality - are explained as
consequences the commensurability condition to the underlying lattice. The effects of the planar anisotropy are also discussed
in detail.
Received: 16 February 1998 / Revised: 20 April 1998 / Accepted: 30 April 1998 |
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Keywords: | PACS 75 10 Jm Quantized spin models - 75 60 Ej Magnetization curves hysteresis Barkhausen and related effects - 75 30 Gw Magnetic anisotropy |
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