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The European Physical Journal B
ISSN: 1434-6028 (printed version)
ISSN: 1434-6036 (electronic version)
Abstract Volume 5 Issue 3 (1998) pp 705-717
Novel massive ground states of spin chains in a magnetic field
K. Totsuka (a)
The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama, 351-01, Japan
Received: 16 February 1998 / Revised: 20 April 1998 / Accepted: 30 April 1998
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.
PACS. 75.10.Jm Quantized spin models - 75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects - 75.30.Gw Magnetic anisotropy
(a) email: totsuka@postman.riken.go.jp
Article in PDF format (501 KB)
Online publication: October 26, 1998
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