Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1999-07-19
Phys. Rev. Lett. 83 (1999) 5579-5582
Physics
Condensed Matter
Strongly Correlated Electrons
RevTeX, 4 pp. incl. 3 figures
Scientific paper
10.1103/PhysRevLett.83.5579
The low temperature magnetization process of antiferromagnetic spin-S chains doped with mobile spin-(S-1/2) carriers is studied in an exactly solvable model. For sufficiently high magnetic fields the system is in a metallic phase with a finite gap for magnetic excitations. In this phase which exists for a large range of carrier concentrations x the zero temperature magnetization is determined by x alone. This leads to plateaus in the magnetization curve at a tunable fraction of the saturation magnetization. The critical behaviour at the edges of these plateaus is studied in detail.
Frahm Holger
Sobiella Constantin
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