English

Dipoles at $\nu =1$

Condensed Matter 2007-05-23 v1

Abstract

We consider the problem of Bosonic particles interacting repulsively in a strong magnetic field at the filling factor ν=1.\nu =1. We project the system in the Lowest Landau Level and map the dynamics into an interacting Fermion system. We study the resulting Hamiltonian in the Hartree--Fock approximation in the case of a δ\delta repulsive potential. The physical picture which emerges is in agreement with the proposal of N. Read that the composite Fermions behave as a gas of dipoles. We argue that the consequence of this is that the composite Fermions interact with screened short range interactions. We develop a Landau theory which we also expect to describe the physical ν=1/2\nu =1/2 Fermionic state. The Form factor, the effective mass and the conductivity are analised in this model.

Keywords

Cite

@article{arxiv.cond-mat/9907484,
  title  = {Dipoles at $\nu =1$},
  author = {V. Pasquier},
  journal= {arXiv preprint arXiv:cond-mat/9907484},
  year   = {2007}
}

Comments

flatex_new vincent.tex, 4 files Proceedings on Composite Fermions and Confinement Moriond, France 1999-03-01 1999-03-06 March 1-6, 1999