MAGNETIC PROPERTIES OF THE TWO-LEG ZIG-ZAG LADDER IN QUANTUM SPIN SYSTEM NH4CuCl3
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(1) Jurusan Fisika, FMIPA, Universitas Indonesia, Depok 16424
(2) Jurusan Fisika, FMIPA, Universitas Indonesia, Depok 16424
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Abstract
MAGNETIC PROPERTIES OF THE TWO-LEG ZIG-ZAG LADDER IN QUANTUM SPIN SYSTEM NH4CuCl3. Numerical analysis of the two-leg zig-zag ladder as a single chain with next-nearest neighbour interactions has been formulated by Cabra (1999) with the following Hamiltonian: Other formulation for two leg zig-zag ladder with dimmerized chains and coupling between the chains is as follow : From these formulations, we study the closing of the gap at zero magnetization by means of the fine—tuning mechanism and disappreance of the 1/2 plateau (gap) at finite by alternating dimerization of the chains along the rungs. We also described NH4CuCl3 under high magnetic fields in a two-leg system.
Keywords
Two leg zig-zag ladder, NH4CuCl3, dimerized chain.
DOI: 10.17146/jusami.2002.3.2.5252