Comparison between disordered quantum spin 1/2 chains

Details Comparison between disordered quantum spin 1/2 chains Comparison between disordered quantum spin 1/2 chains

2006-07-14

arxiv.org/abs/cond-mat/0607387v2

Phys. Rev. B 74, 224435 (2006)

Physics

Condensed Matter

Disordered Systems and Neural Networks

7 pages

Scientific paper

10.1103/PhysRevB.74.224435

We study the magnetic properties of two types of one dimensional XX spin 1/2 chains. The first type has only nearest neighbor interactions which can be either antiferromagnetic or ferromagnetic and the second type which has both nearest neighbor and next nearest neighbor interactions, but only antiferromagnetic in character. We study these systems in the presence of low transverse magnetic fields both analytically and numerically. Comparison of results show a close relation between the two systems, which is in agreement with results previously found in Heisenberg chains by means of a numerical real space renormalization group procedure.

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