Holstein model and Peierls instability in 1D boson-fermion lattice gases

Details Holstein model and Peierls instability in 1D boson-fermion lattice gases Holstein model and Peierls instability in 1D boson-fermion lattice gases

2004-08-12

arxiv.org/abs/cond-mat/0408269v1

Phys. Rev. A 72, 033609 (2005)

Physics

Condensed Matter

Other Condensed Matter

5 pages, 4 figures

Scientific paper

10.1103/PhysRevA.72.033609

We study an ultracold bose-fermi mixture in a one dimensional optical
lattice. When boson atoms are heavier then fermion atoms the system is
described by an adiabatic Holstein model, exhibiting a Peierls instability for
commensurate fermion filling factors. A Bosonic density wave with a wavenumber
of twice the Fermi wavenumber will appear in the quasi one-dimensional system.

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