MAGNETISM AND SUPERCONDUCTIVITY La≥5(Sr,Ca)≤9Cu24O41: A 1D TOY MODEL FOR HOLE DOPED CUPRATES

The interplay between low-dimensional antiferro-magnetism and the mobility of holes in layered cuprates is studied intensively nowadays. A differ-ent approach to investigate this interplay considers quasi-one-dimensional (1D) systems. For 1D sys-tems, theory is much more predictive and experi-ments yield more pronounced results. In our 1D model system (Sr,Ca,La)14Cu24O41 for doped cu-prates, a small number of charge carriers signifi-cantly affects the magnetic properties. In particu-lar, the mobility of holes can be tuned by a magnetic field and thus a long range AFM spin order, which is present if the holes are static, is destroyed by the motion of the depinned holes. In (Sr,Ca,La)14Cu24O41, two quasi-1D magneti