Dresden 2011 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 60: Spin Structures and Magnetic Phase Transitions

MA 60.6: Vortrag

Donnerstag, 17. März 2011, 18:45–19:00, HSZ 103

Itinerant electrons on the Coulomb phase — •Ludovic Jaubert¹, Masud Haque¹, Swann Piatecki^1,2, and Roderich Moessner¹ — ¹MPI-PkS, Dresden — ²ENS Paris, France

The Coulomb phase describes a state encountered in frustrated systems where geometrical constraints lead to the emergence of a gauge field. Its effective description is quite analogous to that of a free magnetic field, with large fluctuations coexisting with algebraic correlations.

In this talk, we shall use this exotic phase as a magnetic background for the motion of itinerant electrons. This permits us to study, within a largely analytical framework, the interplay between frustration and conduction on two- and three-dimensions lattice models. We shall in particular focus on how Coulomb phase fluctuations persist (or not) in the presence of electron doping, and whether they tend to favor insulating or metallic behaviour.