Field-controlled Luttinger liquid and possible crossover into spin liquid in strong-rail ladder systems.

The thermodynamics and transport properties of strong-rail ladder systems are investigated by means of Green's function theory. It is shown that the magnetic behavior clearly manifests a typical antiferromagnetism with gapped or gapless low-lying excitations, which is in agreement with the experimental results. In addition, the temperature-field-induced phase diagram is explored, and we demonstrate a Luttinger liquid behavior in the window h(c) (marking the ending of the M=0 plateau)

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http://dx.doi.org/10.1002/cphc.201000410	DOI Listing