Dimensional tuning of electronic states under strong and frustrated interactions

Details Dimensional tuning of electronic states under strong and frustrated interactions Dimensional tuning of electronic states under strong and frustrated interactions

2007-11-20

arxiv.org/abs/0711.3075v2

Physics

Condensed Matter

Strongly Correlated Electrons

4pages 4figures included. to appear in Phys. Rev. Lett. vol. 100

Scientific paper

10.1103/PhysRevLett.100.186404

We study a model of strongly interacting spinless fermions on an anisotropic triangular lattice. At half-filling and the limit of strong repulsive nearest-neighbor interactions, the fermions align in stripes and form an insulating state. When a particle is doped, it either follows a one-dimensional free motion along the stripes or fractionalizes perpendicular to the stripes. The two propagations yield a dimensional tuning of the electronic state. We study the stability of this phase and derive an effective model to describe the low-energy excitations. Spectral functions are presented which can be used to experimentally detect signatures of the charge excitations.

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